What is the role of cultivating and weeding?

Cultivating and weeding is a traditional method of weeding. Through manual tillage and mechanical tillage, weeds in farmland can be prevented and eliminated in time. Intercropping weeding is highly targeted, clean and complete, and the technology is simple.

It not only controls weeds, but also provides good growing conditions for crops. During the entire process of crop growth, intercropping can be entered as many times as needed for weeding. When weeding, we should seize the favorable opportunity, early, small, and complete, and do not leave grass to avoid future troubles.

The masses ploughed and weeded, and got "grass sprouts."

Weeding is not as good as a herbicide", that is, it is required to weed at the germination stage.

Cultivating refers to the shallow overturning of the soil and the loosening of the topsoil. Mainly loose topsoil, generally combined with weeding, post-rain irrigation and soil hardening. In the North American nursery industry, the field cultivation of large seedlings mostly uses cultivating and weeding, which not only plays the role of loosening soil and weeding, but also avoids the use of herbicides.

caused by environmental pollution. Plants and topsoil cultivation between rows during the growing period of crops. Tools such as hand hoes, plows, tooth rakes, and various cultivators can be used.

Intercropping loosens topsoil, increases soil aeration, raises ground temperature, promotes aerobic microbial activity and nutrient availability, removes weeds, promotes root stretching, and regulates soil moisture status.

Cultivating can finely break up soil clods, loosen soil, circulate air, promote root respiration and soil aerobic microbial activities, promote soil organic matter decomposition, and increase soil fertility.

Intercropping can cut off the capillary water rise, reduce soil moisture evaporation, and maintain soil moisture;

It can make the heat in the soil not easy to dissipate and increase the soil temperature;

In winter and early spring, a loose layer of topsoil can act as insulation;

Cultivating is good for eliminating weeds and pests.

Cultivating principles and methods: The time and frequency of intercropping vary depending on the type of crop, seedling conditions, weeds and soil conditions. Generally, dry farming is carried out at the seedling stage and before the sealing of seedlings, and rice is carried out at the tillering stage.

A crop is planted about 3 or 4 times. For example, if the crop has a long growth period, late harvest, many weeds in the field, and the soil is thick, the number of tillage can be increased, and the ground can be kept soft and free of weeds. In the process of crop growth, the principle of shallow depth should be mastered.

That is, the seedling stage of crops should be shallow, so as not to hurt the roots; In the middle of growth, it should be deepened to promote root development; In the later stage of growth, crops should be shallow first and then sealed, mainly broken and hardened.

This is because in this way, the soil becomes more loose, improves its fertility and air permeability, improves soil permeability, and prevents decay.

This is to make the land wider, but also to make the land more watery, and also to allow plants to grow better, but also to prevent pests and diseases.

This can better weed, can eliminate weeds, can loosen the soil, can make the soil breathable, can better store water and heat preservation.

The function is to eliminate some weeds in the field, make the things planted more nutritious, loosen the soil, and improve the air permeability of the soil.

In this way, weeds can be removed, the planting environment can be improved, and the yield and quality of crops can be improved.

Hello, dear, I am glad to answer for youA: The reason why we need to weed before plowing is that weeding is inevitable. Grass crops are almost the same genes.

The conditions under which the growth is grown, the nutrients absorbed are almost the same as those of the loose grip brigade. Some weeds are more vigorous, and if they are not weeded in a hurry, the grass will quietly compete with crops for sunlight, water, and fertilizer. Crops should be planted reasonably and densely, and a greater density of grass will bring benefits to the growth of crops.

For this farmer uncle for. To increase grain production, we should also weed in times of urgency.

The function of cultivating and weeding is to increase soil aeration and regulate soil moisture content.

Cultivating and weeding can use hand hoes, cultivators, tooth rakes and various cultivators and other tools, cultivating can loosen the topsoil, increase soil aeration, increase ground temperature, promote aerobic microbial activities and nutrient effectiveness, remove weeds, promote root stretching, and regulate soil moisture status.

Cultivation of dry crops such as wheat, rapeseed and cotton can increase the aeration of the soil, increase the oxygen content in the soil, enhance the respiration of crops, and enhance the absorption capacity of the root system, so as to grow luxuriantly. Cultivating in drought can cut off the capillary tube of the soil surface, reduce the evaporation and loss of soil moisture to the soil surface, and improve the drought resistance of the soil.

Principles and methods of cultivating

The time and number of tillage vary according to the type of crop, seedling condition, weeds and soil conditions, generally dryland crops in the seedling stage and before the closure, rice in the tillering stage, a season of crops about 3 4 times, such as the crop growth period is long, the closure is late, there are many weeds in the field, the soil is heavy, the number of tillage can be increased, in order to keep the ground loose and free of weeds.

During the growth period of crops, the principle of shallow-deep-shallow cultivation depth should be mastered, that is, the seedling stage of crops should be shallow so as not to damage the roots; The middle growth stage should be deepened to promote root development; In the late growth stage, the crop should be shallow before the closure, and the main thing is broken and compacted.

The role of cultivating and weeding is to increase soil aeration. Cultivation of dry crops such as wheat, rapeseed and cotton can increase the aeration of the soil, increase the oxygen content in the soil, enhance the respiration of crops, and enhance the absorption capacity of the root system, so as to grow luxuriantly.

There is also the regulation of soil moisture content. Cultivating in drought can cut off the capillary tube of the soil surface, reduce the evaporation and loss of soil moisture to the soil surface, and improve the drought resistance of the soil.

Other effects of cultivating and weeding.

Increase the available nutrient content of the soil. The organic matter and mineral nutrients in the soil must be decomposed by soil microorganisms before they can be absorbed and utilized by crops. Because the vast majority of microorganisms in dry soil are aerobic, when the soil is compacted and not aerated and the oxygen in the soil is insufficient, the microbial activity is weak, and the soil nutrients cannot be decomposed and released.

After cultivating and loosening the soil, soil microorganisms are active due to sufficient oxygen, which decomposes and releases a large number of potential nutrients in the soil, and improves the utilization rate of soil nutrients. Inhibit the growth of crops, when the vegetative growth of crops is too vigorous, deep cultivation can cut off part of the root system, control the absorption of nutrients, and inhibit the growth.

In paddy field cultivation, the fertilizer applied to the surface layer can be stirred to the bottom layer to achieve the purpose of soil and fertilizer integration and mud aeration. It can also eliminate harmful substances and nitrogen prevention in the soil, promote the occurrence of a large number of new roots, improve the absorption capacity, and increase tillering.

<> weeding can loosen the topsoil, increase the ground temperature, reduce water evaporation, promote nutrient decomposition, and improve the air permeability of the soil. Cultivating work should be early and skillful, early cultivation refers to weeding to be early, to be small, skillful cultivation refers to to grasp the principle of "shallow in the morning, far away from the seedlings, deep when waterlogged, and close to the seedlings". The depth of tillage varies from crop to crop, shallow root crops (such as cucumbers, onions and garlic) should be cultivated in shallow mode, and deep and slippery root crops (such as melons and eggplant) should be cultivated in depth.

1. What is the function of cultivating and weeding?

1. Function. (1) Loosen the topsoil, improve temperature and moisture.

2) Reduce water evaporation and promote the decomposition of nutrients in the soil.

3) Increase air permeability and the activity and reproduction of beneficial microorganisms.

2. Key points of cultivation.

1) The cultivation time should be early and coincidental. Early tillage means weeding should be early and small, and early loosening of soil can promote root development; Qiaozhong cultivation is to master the principle of "shallow in the morning, far away from the seedlings, deep in waterlogging, close to the seedlings" and "shallow next to the seedlings, deep between the rows".

2) The depth of cultivation varies according to the type of crop and plant size, shallow root crops such as cucumbers, onions and garlic should be shallow, and deep root crops such as melons and eggplant fruits should be deep.

3) During the growth period, the method of "shallow at both ends and deep in the middle" can be used for cultivating.

Second, the method of cultivating and weeding car leakage

1. Cultivating. (1) According to the number of weeds and the compaction of the soil, it can generally be cultivated 2-3 times, and the tillage work can be completed before the closure.

2) Every time you cultivate it, you should ensure that the soil is loose, the ground is flat and clean, and the seedlings are not pressed, injured, or buried.

3) After the seedling stage and transplanting slow seedlings, when most of the soil surface is exposed to the air, the cultivation can be carried out, the seedlings gradually grow up, the branches and leaves cover the ground, and the weeds are difficult to germinate, and the cultivation should be stopped, because the root system of the plant has spread at this time, and it is easy to accidentally injure its root system during cultivation.

2. Weeding. (1) Carry out manual weeding in combination with cultivating from April to September, remove weeds by using tools such as sickles and hoes, or pull them out manually.

2) Dilute the herbicide with water, mix it into a solution in appropriate proportion, and then spray it on the weeds.

3) Cover the planting field with plastic film, or cover a layer of straw and straw, with a thickness of 6-8 cm, which can inhibit the weeds from closing the soil and growing.

Herbicide application is not a substitute for tillage, why is that? Because the effect is not good, the main harm of herbicides to bees is to destroy the beneficial bacteria in the bees' intestines and make the bees emaciated. According to the autopsy and actual observations, after three times of bee herbicide poisoning, the average intestine turned black, and only one in ten survived after eight days.

As a result, bees collect nectar and herbicides contaminated with herbicides. Although it is not very toxic, it is only a pesticide used for weeding in the field, and it has a certain toxicity, especially for bees that are sensitive to toxic substances, and its harm is also great.

The herbicide is not highly toxic, but it is only an insecticide used to remove weeds in the field, and it is also very toxic, especially for bees that are sensitive to toxic substances. The product should be used on a sunny morning. After a full day during the day, the drug is absorbed by the plant at night.

It will reduce the damage of some bees by sucking the dew from the plant.

To assess the safety of these herbicides to bees, the results showed that 10% of EC and herbicides were almost devastating to bees. Spraying pesticides or herbicides into the redo area of the apiary, as well as toxic substances in the air, can cause bee poisoning or severe bee loss. They will never come back, leading to a significant decline in bee populations.

They measured the exposures by the exposure method and the ingestion method of zhi, as well as the toxicity of ingestion of 8 herbicides to adult Italian worker bees, in order to assess the safety of these herbicides against honey bees. The results show that the effects of herbicides on bees have been studied in the scientific and technical literature. They determined the exposure and feeding toxicity of eight herbicides to adult Italian bees using contact and feeding methods.

To evaluate the safety of these herbicides against bees, the results showed that EC contains 10% ethylcarboxyfluorothane...

Analysis of the usefulness of cultivators

The use of organic chemical herbicides in agriculture has been basically widespread, and some farmers think that the weeds have been removed and there is no need for cultivation after using herbicides. In fact, herbicides only have weeding, and cannot replace cultivating, which has a variety of other key effects in addition to weeding.

Improve soil aeration. Cultivating crops such as cotton wool can improve the air permeability of the soil, increase the oxygen content in the soil, improve the photosynthesis of food crops, and improve the absorption capacity of rhizomes, so as to grow and develop luxuriantly.

Improve the rational nutrient composition of the soil. The organic matter and mineral nutrients in the soil should be dissolved by soil microorganisms before they can be digested and absorbed by food crops. When the soil is agglomerated and not ventilated, and the soil is hypoxic, the soil nutrients can not be sufficiently dissolved and released.

After tillage and soil turning, soil microorganisms are abundant and active due to abundant O2, and many potential nutrients of the soil are dissolved and released, which improves the utilization rate of soil nutrients.

Adjust soil moisture composition. Cultivating during drought can break the capillaries on the soil surface, reduce the volatilization and loss of soil moisture transported to the soil surface, and improve the drought tolerance of the soil.

Raise soil temperature. Cultivating and turning over the soil can loosen the soil, expand the total area of sunlight, improve the digestion and absorption of solar radiation, weaken the heat dissipation capacity, and quickly transmit the heat to the deep layer of the soil and increase the soil temperature.

Inhibition steeply long. When the vegetative growth of grain crops is too vigorous, deep cultivation can break off a part of the rhizome, manipulate the digestion and absorption of nutrients, and inhibit the steep growth.

Fertilization is integrated. In the cultivation of rice fields, the fertilizer on the surface can be mixed to the bottom layer, so that the fertilization is integrated and the mud is ventilated. It can also remove harmful substances and avoid denitrification in the soil, promote the production of new roots, improve digestion capacity, and improve heading.

The importance of cultivating

In the rainy season, the soil is often saturated with water, especially in the fields where the ditching and drainage pipes are not good, coupled with the large number of continuous precipitation days in the month and the simple age, the gas in the soil is often squeezed out by precipitation, at this time, deep cultivation is carried out, because the shovel breaks the capillaries of the soil, the surface water can not be raised, in the hoe loose soil, the soil moisture content is rapidly reduced because of volatilization, and then the soil temperature is quickly warmed up, and the soil is warm and breathable. This is beneficial to the hair of melons, fruits and vegetables, and the maturity increases the yield.