What are the technical points of using biogas slurry for drip irrigation of orchards?

Technical points: The biogas slurry drip irrigation technology is only suitable for mountain orchards, and the biogas digester needs to be built at the highest point (higher than the fruit tree planting area): The biogas slurry sedimentation filter tank is built to remove solids in it and prevent the drip hole from clogging.

The volume of the filtration sedimentation tank is 1 4 of the volume of the main fermentation tank, a plurality of plug-in filter screens are arranged in the tank, the filter screen is composed of a filter frame and a filter plate, the filter plate is divided into a coarse plate and a fine plate, and the coarse plate is installed and then the fine plate is installed along the flow direction of the biogas slurry, and the specific number of installation blocks should be determined according to the amount and size of the solid matter in the biogas slurry. The solids are intercepted and the slurry becomes lighter. Pipe installation.

The main pipe is buried 30-50 cm underground with a PVC high-pressure pipe. The subdivision adopts elastic and high-strength plastic pipes, the embedding depth is 30 60 cm, and the cross-sectional area of the sub-pipes is smaller than the cross-sectional area of the main pipe. Each root system of citrus trees is equipped with 2 drip holes, and the diameter of the drip holes is usually centimeters, and the total area of the drip holes is less than the cross-sectional area of the subdivision.

The area around the drip hole with a radius of 5 7 cm is filled with fine stones and coarse sand to prevent the drip hole from clogging. Every 20 to 30 meters on the main stream pipe, a drainage port is arranged, and the mouth end is equipped with a valve of the same diameter. At the end of the subdivision or every 5 10 meters, a drainage mouth should also be set up, and the diameter of this mouth is small and can be sealed with a rubber stopper.

Day-to-day management. Clean the filter plate frequently, check if the drip irrigation system is leaking outside the roots of the fruit tree, and fix the problem immediately. It is best to use the same system for drip irrigation of both slurry and clean water, as long as the water is piped to the sedimentation filter tank.

1. Increase output and improve quality factors.

Compared with other irrigation methods, the yield of drip irrigation fruit trees has been improved over the years due to the fact that drip irrigation has the advantages of uniform irrigation, which directly delivers irrigation water and chemical fertilizer dissolved in water to the root zone of fruit trees, which can meet the water and nutrients needed for fruit tree growth in a timely and appropriate manner.

2. Save irrigation water.

Because drip irrigation directly transports irrigation water from the water source to the roots of fruit trees through a closed pipeline system, it eliminates the evaporation and seepage losses in the process of channel water transportation, field runoff and deep seepage loss, etc., so that the irrigation water only moistens the local soil in the root area of fruit trees, and also reduces the soil evaporation loss, field runoff and deep seepage loss between the rows of plants compared with the ground irrigation method, so that the utilization rate of irrigation water is significantly improved. The results of experiments in various places show that drip irrigation saves about 50%-70% of water compared with surface irrigation. This is of special significance to make full use of limited water resources and expand the irrigation area of fruit trees in hilly and water-scarce hilly and water-scarce mountainous areas and high-head irrigation areas.

3. It is conducive to the growth and development of fruit trees.

It can effectively promote the growth of the tree and increase the synthesis and accumulation of leaf nutrients.

Fourth, save labor. The orchard with the drip irrigation system realizes pipeline water transmission and fixed irrigation device (dripper) irrigation, which not only greatly improves the irrigation efficiency, but also saves labor. In hilly areas, drip irrigation does not need to build terraces and level land, which saves labor such as repairing canals, carrying water and spraying pesticides, and indirectly saves a lot of labor.

Fifth, energy saving, low operating costs.

In the case of wells or pumping stations, drip irrigation saves water, reducing the amount of water pumped compared to sprinkler or surface irrigation, and therefore reducing energy consumption and operating costs. Although the operation of the drip irrigation system requires a certain amount of working pressure and consumes more energy than surface irrigation, the energy saved by drip irrigation due to water saving generally far exceeds the energy consumed by drip irrigation under the condition of water lifting.

Sixth, you can use salt water drip irrigation.

Because drip irrigation keeps the soil around the roots moist at all times, even if the irrigation water contains more salt, the capillary action of the soil transports the salt in the irrigation water and the soil to the edge of the moist zone, reducing the damage of salt to the fruit trees. Therefore, drip irrigation can be used for irrigation in areas where the salt content of irrigation water is high and it is not suitable for surface irrigation or sprinkler irrigation.

Biogas slurry is used for foliar spraying of fruit trees, with fast effect and high utilization rate (80% of the spray amount can be absorbed by leaves within 24 hours), which can supplement the nutrient needs of fruit tree growth. Spraying biogas slurry during the leaf growth period can improve the photosynthesis ability and facilitate the formation and differentiation of flower buds. Spraying biogas slurry at the flowering stage can ensure the nutrients required during the flowering period and improve the fruit setting rate. Spraying biogas slurry during the fruit growth period can promote fruit expansion and increase yield. At the same time, it has a certain effect on the prevention and mitigation of fruit tree diseases and pests.

1) Spraying time.

The aboveground parts of fruit trees can be sprayed with biogas slurry before and after each growth period.

2) Spray concentration.

Usually, it is better to spray with pure biogas slurry. However, when the temperature is high, it is advisable to appropriately reduce the concentration of spraying biogas slurry, and an appropriate amount of water can be added to the biogas slurry to prevent the water from evaporating too quickly when the temperature is high. The use of biogas slurry has a certain control effect on fruit tree aphids, red spiders, etc., and the reduction rate of pests can reach more than 50% 48 hours after spraying biogas slurry.

With an appropriate amount of pesticides added to the biogas fermentation broth, the control effect on pests and diseases will be more obvious.

3) Fine spraying.

The biogas fermentation broth is taken out of the water pressure room of the biogas digester, left for 1 2 days and then sprayed. If the biogas slurry from the biogas manure tank (or overflow tank) is used, it can be used immediately. When spraying biogas slurry, it is necessary to focus on the back of the leaf (because the surface layer of the leaf is thick and does not easily absorb the biogas slurry, while the back of the leaf is easy to absorb the biogas slurry), and it is best to combine it with spraying pesticides.

Spraying of biogas slurry is generally carried out every 10 days or so. The amount of spray can be determined based on factors such as the size of the canopy, the nutritional status of the tree, etc. For fruit trees that bear fruit for many years, due to excessive nutrient consumption, urea can be added to the biogas slurry to increase the nitrogen concentration, which can effectively increase the number of flower buds in the next year.

For young and overgrown fruit trees or fruit trees with few fruit hanging in the current year, phosphorus and potassium fertilizers can be added to the sprayed biogas slurry to promote the formation of flower buds in the next year.

4) Precautions.

Do not spray at noon when the temperature is high. Due to the high temperature, the water evaporates too quickly, which seriously affects the spraying effect and is easy to burn the leaves.

1) Sprinkler irrigation: suitable for mountainous areas, slopes, and grass orchards with uneven orchards. There are two types of sprinkler irrigation: fixed or mobile.

The height of the sprinkler head is above the canopy, around the canopy**, around the trunk, etc. The advantage of this method is to save water, save labor, in addition to the irrigation section of the round, but also take into account part of the spraying, fertilization, hormone spraying operations, and can prevent frost in spring, high temperature in summer, so that the yield of fruit trees increased by 5 10%. The adoption of this method requires special equipment, more investment, and the facilities remain in the orchard for a long time, which is not easy to take care of, and the application has gradually become younger in recent years.

2) Drip irrigation: It is a new water-saving irrigation method that is worth promoting. Drip irrigation can provide continuous water supply to local roots, and the soil structure is well maintained and the water status is stable.

This method is more water-saving and labor-saving than sprinkler irrigation, and has a significant effect on preventing secondary salinization of soil, which can increase yield by 20 to 30%. It is especially suitable for orchards with drought and severe water shortage. The drip irrigation system consists of a pump, a filter, a pressure regulating valve, a flow grip regulator, a water channel, and a dripper.

The frequency and amount of drip irrigation depends on soil moisture and the water needs of the fruit trees. In the spring drought, drip irrigation can be done every day, generally once every 2 or 3 days. Each irrigation is 3 to 6 hours, and each dripper is drip 2 kg per hour.

Drip irrigation saturates the soil with the first drip irrigation and then keeps the soil moisture at about 70% of the maximum water holding capacity in the field.

Biogas slurry can be used for drip irrigation.

Biogas slurry contains high available nutrients, has the same nutrient capacity as chemical fertilizer, and is an organic fertilizer, adding biogas slurry can improve vegetable yield, increase yield by 10-20%.

The biogas slurry treatment method is to successfully separate the biogas slurry from the biogas residue by engineering filtration, so as to solve the problem that the biogas slurry drip irrigation is easy to block. The biogas slurry sedimentation tank was constructed, and a filter screen was set up in the tank, which was composed of two kinds of plates, the thickness of the filter screen oil was 5-10cm, the thickness of the shell was 5-10cm, and the thickness of the polyethylene foam board was 2-3cm.

The biogas slurry flows through the coarse plate to the fine plate. The large and small solids in the biogas slurry were intercepted to meet the requirements of drip irrigation. After the filtered biogas slurry is mixed with water, the irrigation and fertilization of crops are realized.

Biogas manure is mainly applied to grape fruit trees, mainly using biogas residue as basal fertilizer before winter, and strong fruit fertilizer in summer. Use biogas slurry as root top dressing and foliar fertilization.

1. After the fruit picking of the fruit tree to the germination of teeth, in order to make the fruit tree grow normally, the leaves are safe to survive the winter, and ensure the bumper yield of the next year, you can use three thousandths of urea plus 50 biogas slurry to spray foliar fertilizer 1 2 times. Dig a pit under the drip line of the fruit tree, and apply 10 50 kg of well-rotted biogas residue fertilizer plus 1 kg of calcium, magnesium and phosphorus fertilizer plus kg of bran fertilizer according to the large and small roots of the fruit tree.

2. It is used for tapping. Before the buds of spring, summer and autumn shoots grow to the size of mung beans and the leaves of the shoots turn green, add 5 50 kg of pure biogas slurry with an appropriate amount of rotted bran water for rhizosphere fertilization, once every 15 days, and apply 3 times in a row. Spraying 2 3 times with urea plus 50 biogas slurry combined with insecticide and disease prevention can obviously play the role of attacking, strengthening the roots, preventing insects and preventing diseases.

3. It is used to preserve flowers and fruits. Before the budding of fruit trees to flowering, in order to improve the flower quality, apply 1 2 times of pure biogas slurry and bran water and fertilizer to the roots. Foliar sprays were applied 2 times of 30 biogas slurry plus borax plus Lvwang 1.

After flowering and before the end of physiological fruit drop, 2 3 times of pure biogas slurry plus bran water and fertilizer were applied to the roots, and 2 3 times of 30 times of biogas slurry plus urea or Luwang 2 were sprayed on the foliar surface, which could significantly improve the fruit setting rate and increase the yield.

4. In the fruit expansion period, as with fertilization before germination, apply 1 time of biogas residue fertilizer to the roots, and spray 50 biogas slurry fertilizer and potassium dihydrogen phosphate many times, which can effectively promote fruit expansion, increase sugar content, promote fruit coloring and brightness, and mature early.

Precautions for using biogas fertilizer.

1. Biogas residue is best applied with calcium, magnesium, phosphorus fertilizer, turf mud in a ratio of 10:1:10 and appropriate bran compost for 30 50 days as base fertilizer and fruit-strengthening fertilizer.

2. Biogas slurry fertilizer can not be mixed with pesticides for the prevention and control of pests and diseases, and high concentrations can not be used, 30 50 is appropriate, and the spraying time is suitable before 11 a.m. and after 3 p.m. on a sunny day.

3. Biogas fertilizer should not be mixed with strong alkaline substances and pesticides, so as not to reduce fertilizer efficiency.

Can you apply biogas slurry to the vineyard in early June?

1) Seed drying: In order to improve the water absorption of seeds, before soaking in biogas slurry, the seeds should be dried for 1 2 days to remove debris to ensure the purity and quality of the seeds.

2) Bagging: Choose a woven bag or cloth bag with good water permeability to load the seeds, 15 to 20 kg per bag, and leave appropriate space to prevent the seeds from bursting the bag after absorbing water.

3) Clean the discharge room of the biogas digester: remove the scum and debris in the discharge room as much as possible to facilitate soaking the seeds.

4) Soaking seeds: Prepare a wooden pole and rope for the Zhun Hong Divine Group, place the wooden pole horizontally on the water pressure room, and then tie one end of the rope to the pocket, and fix the other end on the wooden bar, so that the seed bag is in the middle of the biogas slurry. Some of the soaking times are shorter (less than 12 hours) and can be done in containers filled with biogas slurry.

5) Cleaning: After the soaking of biogas slurry, the seeds should be washed in clean water, and then sown or germinate.

Summary. 1.Seed drying: In order to improve the water absorption of seeds, before soaking seeds in biogas slurry, the seeds should be dried for 1-2 days to remove impurities to ensure the purity and quality of the seeds.

2.Bagging: Choose a woven bag or cloth bag with good water permeability to load the seeds, each bag is 15 20 kg, and leave appropriate space to prevent the seeds from swelling and bursting the bag after absorbing water.

3.Remove the discharge room of the biogas digester: remove the scum and debris in the discharge room as much as possible to facilitate soaking the seeds.

What are the technical points to be mastered in biogas slurry soaking?

Hello This is a very good question, I need a little time to answer, please be patient.

1.Seeding: In order to improve the water absorption of seeds, the seeds are dried for 1-2 days before soaking in the sedan sedan to remove debris to ensure the purity and quality of the seeds.

2.Bagging: Choose a woven bag or cloth bag with good permeability to fill the seeds, each bag contains 15 20 kg, and leave appropriate space to prevent the seeds from swelling and bursting after absorbing water.

3.Remove the discharge room of the biogas digester: remove the scum and debris in the discharge room as much as possible to facilitate the soaking of seeds.