Late planting vegetables
Most of the late cultivating and weeding plants were transplanted in the rain gap. Because of severe soil compaction, the cultivator should be cultivated in time to loosen the soil, eliminate the earth, promote root growth, transplant rapeseed to eliminate field weeds, and dig the surface soil. The soil clods break. When the oilseeds turn green, they should be deep in the cultivator, loosen the soil, remove the soil, and clean up the ditch in combination with the cultivator, so that the ditch, gutter, gutter, and ditch can communicate with each other. Drainage is smooth and the field is not stained with water to increase the temperature.
The Qiao Shimiao seedling fertilizer should be timely applied to raise seedlings after transplanting. The sooner the better, generally use 3-5 kg ​​of urea per mu, 5 kg of potassium chloride, 300-500 g of boron fertilizer, 750-1000 kg of thin man-to-human livestock manure, 1-2 times of topdressing, or carbon per acre. Ammonium 45-50 kg. Make full use of the higher temperature after the weather is fine, and promote the long-rooted and long-grown leaves of rape.
Re-apply wax fertilizer to organic fertilizer-based, medium-fertility plots, apply 1,000-1,500 kilograms of beef cattle per acre, 10-12 kilograms of superphosphate, and 5-7.5 kilograms of ammonium bicarbonate. Mix the three fertilizers together. , Applying into the rapeseed line, combined with cultivating cultivators, play a role in maintaining warmth, promoting roots, protecting roots and increasing fertilizers.
Foliar application of phosphate fertilizer foliar spray phosphorus fertilizer can enhance its cold resistance. The concrete method for preparing phosphate fertilizer solution is to take 2 kg of finely ground phosphate fertilizer per mu, put in a container and add appropriate amount of water to soak, and remove it after one week. Add 200 grams of urea spray to the blade to start dripping. If the container is small and the formulated phosphate fertilizer liquid is not enough, a small amount of fresh water may be added to supply the maximum amount of leaf suction for reducing the evaporation amount of the solution. The spraying should be performed in the absence of strong wind in sunny afternoons, with an interval of one to two weeks. According to practical observation, on the third day after the liquid was sprayed, some of the leaves that had been frozen to yellow turned green and the growth rate accelerated rapidly. After the second spray at intervals, the leaves had increased from the original four to five. Eighty-nine pieces, and green leaves, strong leaves and stems, thick and straight leaves stretch.
Control of late planting of late rapeseed due to weak nutrition before winter, easy to produce early pods and early flowers, can be controlled according to the situation. The first is the use of deep-medium cultivators for well-grown and fertile fields. The second is that the poorly growing rapeseed fields can be replanted with nitrogen fertilizers, which can effectively delay the growth of vegetative growth, increase the amount of growth, and prevent the occurrence of early pods and early flowering.
Spring fat and strong seedlings are good for spring rape and strong seedlings for late planting rapeseed, which is an important measure to solve the problem of late planting of rapeseed to seize high yield. Generally after the beginning of spring, urea 8-10 kg per mu, convulsions to recover 5-7 kg, and strive to set up high yield frame. Rely on re-applying spring fertilizers to raise the seedlings and achieve high yields. The occurrence of downy mildew in late spring rape can be strictly prevented. In the flowering stage, it is possible to use pesticides such as chlorfenone and chlorpyrifos for prevention and treatment.
Synthetic organic reagents such as potassium ethylxanthate for the detection of nickel, copper and molybdenum; Aluminium was examined by morin; Nitrite was detected by diazo coupling reaction. Cobalt was detected by α-nitroso-β-naphthol. Test nickel with dioxime. Organic reagents are widely used in analytical chemistry, mainly used in solvents, precipitants, complexing agents, indicators, chromogenic agents and surfactants. In order to adapt to different analytical needs, some reagents are sometimes needed to be purified, liquid organic reagents are often purified by distillation, solid substances are purified by crystallization or sublimation. Substances with high vapor pressure, that is, purified organic reagents that do not decompose at low boiling points and boiling temperatures, are usually distilled at atmospheric pressure; For less volatile and slightly soluble substances in water that is purification boiling point higher or boiling temperature decomposition of organic reagents can be used to reduce pressure distillation or steam distillation.
2 7-Naphthalenedisulfonic Acid Disodium Salt,Butyl Isobutyrate,N-PROPYLBENZENE,Butylchloroformate
Xi'an Henrikang Biotech Co.,Ltd , https://www.henruikangbio.com