What harm will happen if the leaves of the persimmon tree are sprinkled with ash from the bottom of

The leaves turn black, and the leaves are unable to photosynthesize, blocking the stomata and hindering the respiration of the leaves.

The biodynamic planting method was first proposed by the Austrian philosopher and educator Rudolf Steiner in 1924. Biodynamic cultivation takes the cultivation of grapes and the entire vineyard as a whole, forming a closely integrated and intertwined ecosystem, advocating the philosophy of ecology, organic, natural and self-sufficiency, and the connection between matter, energy and man and nature in the process of repeated cycles, and finally produces complex and varied, rich and mellow wines. Biodynamics, which is not only a mysterious agricultural system, but also a worldview, maintains biodiversity, truly reflects the terroir behind the wine, and makes the resulting wine taste clearer and more active, promoting the healthy and sustainable development of the entire winemaking industry in nature and spirit.

Concept: On a piece of land, two or more crops are planted at intervals according to a certain number of rows at intervals at the same time, and this cultivation method is called row planting, referred to as intercropping.

Significance: The two organisms of the interspecies have a long co-growth period. Intercropping tends to be between tall crops and dwarf crops, such as corn, soybeans or vegetables.

The implementation of intercropping can be dense planting for tall crops, making full use of the marginal effect to obtain high yield, dwarf crops are less affected, in general, due to good ventilation and light transmission, light energy and CO2 can be fully utilized, and the yield can be increased by about 20%. Among them, the lower the number of rows of tall crops and the more rows of dwarf crops, the better the intercropping effect.

Inter-row planting, inter-row planting. The meaning of interval means that the original planting is too dense, and one or two trees are removed from the two trees and planted in other places. This method is called inter-row planting.

For example, if you plant a row of corn, plant a row of soybeans next to it, and then plant a row of corn, then the corn is planted in an intermittent row.

The most important meaning is to plant one plant in one row, and the other next to each other, in the sense that it is convenient for hybridization. For example, in the CCB planting of corn, BB type and BB type corn, when pollinating, remove the pistil, and hybridization can be realized.

When planting crops, they should neither be too thick nor too thin, and should be moderately spaced between rows.

The water can neither be too waterlogged, nor too drought, and should be adapted to the needs of the plant itself, and the spacing can neither be too dense nor too sparse, and should be considered comprehensively according to the growth of the plant and the local soil climate and environment.

Fertilization can neither be too concentrated nor too light, and should be "thin fertilizer and diligent".

You can't be too dense and too sparse. Attention should be paid to the interval.

It should neither be too sparse nor too dense, and should be adapted to local conditions.

Biological control includes insect control and fungus insect control, and the main measures are to protect and use the natural enemies of natural pests, reproductive dominant natural enemies, and the development of sex hormones to control insect pests.

Biological control technology is now a technology used in agriculture in many countries, especially for organic agricultural products, the use of biological control technology can avoid the use of pesticides, maintain the safety, health, pollution-free of agricultural products, and protect the environment.

Biological prevention and control in the United States adopts the utilization and protection technology of natural enemies based on mites to control mites, release red-eyed bees, trap and collect natural enemies in cotton fields, co-breeding of rice ducks, and ladybugs, frogs and beneficial birds.

In the Department of Entomology of Michigan State University in the United States, about 25kg piglets are used to control pests and diseases in the process of organic apple production.

Greenhouses in the Netherlands are stocked with a species called macrolophus (blind tsubaki) as a natural predator of the pest, which lays its eggs under the leaves to control those pests. There are also boxes the size of ordinary shoeboxes, each box contains about 100 bumblebees, which are responsible for pollinating tomatoes in an area of one hectare, but they have a very short lifespan, only about ten days to work, so the staff will add a new one every week.

In Xiaoshan District, Hangzhou City, China, leafy vegetables are more seriously harmed by the yellow koji jumping beetle, and the growers are more damaged, and the occurrence of radish insect pests is effectively inhibited by the introduction of entomopathogenic nematode prevention and control technology. The larvae and pupae of the yellow beetle live in the soil, and the nematodes will parasitize on their larvae, eliminating the pests at the initial stage, and the control effect is obvious.

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Breeding, planting professional.

Cultivate application-oriented talents engaged in plant, livestock and poultry production, technical services and operation management.

Main courses] Crop Production Technology, Vegetable Production Technology, Forest and Fruit Production Technology, Product Processing and Storage, Breeding Knowledge, Agricultural Machinery Use and Maintenance, Agricultural Management, Animal Anatomy and Physiology, Animal Microbiology, Animal Nutrition and Feed, Diagnosis and Treatment Technology of Livestock and Poultry Diseases, Animal Genetics, Breeding and Reproduction, Animal Environmental Health, Pig Breeding, Cattle Breeding, Sheep Breeding, Poultry Breeding, Special Animal Breeding, Animal Husbandry Management, Computer Application Basics, etc.

Faculties and Departments. The Department of Agronomy of Changzhi Vocational and Technical College was established on the basis of the agronomy major of the original Changzhi Agricultural School, which has been opened for nearly 50 years, cultivated 41 teaching classes, and delivered more than 2,000 qualified middle and senior agronomic talents to the society. The Department of Agronomy was reorganized in March 2004 when the department was reorganized, and the reorganized Department of Agronomy has a well-qualified, well-structured and strong teaching team.

At present, there are 13 professional teachers, including both agricultural teachers and biology teachers.

Biotechnology has facilitated the use of resource-conserving farming practices, reducing soil erosion by 66 percent, herbicide loss by 70 percent, carbon dioxide emissions by 100 million pounds, and reducing water loss by 18 centimeters per year due to soil evaporation, making soybean fields more drought-resistant and reducing fuel use by more than 50 percent.

At present, the materials commonly used in dental implants are metal coverings, leather socks, pure titanium and titanium alloys, and ceramics include bioactive ceramics and some composite materials.

Bioceramic implants are mostly made of monocrystalline alumina or polycrystalline alumina. Monocrystalline alumina implants are transparent, also known as bioglass, and have good biocompatibility. Orthodontists* pointed out that if oral implant technology is used, it will take about 6 months for the implant and bone tissue to produce osseointegration, and the absorption situation depends on its own situation.