Planting Technology Lists
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Scientific application of potash fertilizer
Potassium is one of the three elements of fertilizer, and the demand for potassium in many vegetables is often greater than that of nitrogen and phosphorus. The potassium content of well-growing vegetables is 2.5% of its dry matter content, which is higher than that of nitrogen and phosphorus. Most vegetables absorb more potassium than nitrogen. For example, the ratio of nitrogen to potassium absorbed by cucumbers is 1: (1.5-1.7), that of pumpkins is 2.1 and that of tomatoes is 1.
2018-07-16 -
Application of potash fertilizer in vegetables
There are many kinds of potash fertilizer, and different kinds of potash fertilizer have different application methods. Commonly used potash fertilizers include potassium chloride, potassium sulfate, potassium magnesium fertilizer and plant ash. Potassium chloride and potassium sulfate are physiologically acidic fertilizers and should be applied in combination with lime and organic fertilizer. Potassium chloride with high chlorine content should not be used to avoid chlorine such as potatoes.
2018-07-16 -
Low application rate of potash fertilizer reduces crop yield
Foliar fertilization is a fertilization method in which the diluent of chemical fertilizer or trace elements is sprayed on the leaf and absorbed by the plant through the leaf stomata, so it is also called extra-root topdressing. The advantages of extra-root topdressing are: small amount, rapid and significant fertilizer effect, fertilizer will not be fixed by the soil, not absorbed by the root system.
2018-07-16 -
The selection of potash fertilizer varieties should be "four looks".
There are many kinds of nitrogen-containing fertilizers, such as urea, ammonium sulfate, ammonium bicarbonate, ammonium chloride, ammonium nitrate and so on. Ammonium urea, a new type of nitrogen fertilizer with high utilization rate, entered the farmland, which greatly improved the nitrogen use efficiency. Compared with urea, ammonium urea has the following advantages. One.
2018-07-16 -
What kind of phosphate fertilizer is suitable for drip irrigation system
Phosphorus fertilizer used in drip irrigation systems must be water soluble. Traditionally used phosphorus fertilizers, such as calcium superphosphate, are mainly water-soluble calcium dihydrogen phosphate, but there are other insoluble impurities, so they are not suitable for drip irrigation systems. Monoammonium phosphate, diammonium phosphate, potassium dihydrogen phosphate and phosphoric acid are all completely soluble and are very good...
2018-07-16 -
How to distinguish the good from the bad of phosphate fertilizer
August to October is the suitable sowing time for autumn crops in the south, such as rape, broad beans, green manure, potatoes and a variety of autumn vegetables. Experienced farmers understand that autumn sowing crops emphasize the application of phosphate fertilizer, which is based on the causal relationship among crops, soil and fertilizer.
2018-07-16 -
Types of pesticides and matters needing attention in their selection
1.1 Inorganic pesticides are classified according to their composition and source, such as lead arsenate, calcium arsenate, arsenite, sodium fluoride, sodium fluorosilicate, sulfur, zinc phosphide, etc. Organic pesticides. Natural organic insecticides can be divided into plant insecticides (such as ivy, pyrethrum, tobacco, turpentine, anistemisin, azadirachtin, etc.) and mineral pesticides.
2018-07-16 -
How to Control Flower Diseases by Home-made insecticides
Common chemicals have varying degrees of drug damage to vegetables and fruits, such as omethoate should not be used 30 days before harvest, malathion is harmful to melons and peaches, fenitrothion is harmful to cruciferous plants, and fruits and vegetables should not be used 15 days before harvest. Dichlorvos should not be a week before fruit trees and vegetables are harvested.
2018-07-16 -
Taboos on the use of common pesticides
1. Chlorpyrifos is easy to cause drug damage when used in melon seedling stage, and it should be avoided in the flowering stage of some crops. two。 The pesticide of triazophos is not suitable to be used in sugarcane, which is easy to cause drug damage. 3. Because phoxim is easy to decompose in visible light, it should be avoided in watermelon growing period, radish and leafy vegetable seedling stage (even in growing period.
2018-07-16 -
Application of Pieris rapae granulosis virus insecticide in vegetable production
Pieris rapae granulosis virus, trade name: Yang Kang, Wuzhou No. 1, Pieris rapae virus, Wuda Oasis Precision Chong Ke, general name: Pieris rapae granulosis virus, the main dosage form is concentrated powder, is a live virus insecticide, is processed by the death of Pieris rapae granulosis virus, is a low toxic insecticide, only for.
2018-07-16