The period from May to June is the period of late winter wheat management and spring crop topdressing. Recently, many peasant friends called and consulted experts, and raised many questions about the application of potash fertilizer. The newspaper asked experts to focus on the solution for the farmers' friends. . - Editor Mr. Ke of Xuancheng, Anhui Province asked: The rice base fertilizer is not applied with potassium fertilizer. Can it be applied after heading? Answer: Potassium fertilizer can be used as a base fertilizer once, or before transplanting and jointing. However, if the supplement is applied after heading, it will be too late and it will affect the absorption, because the nutrient of the stem and leaf will begin to transfer to the grain and the root absorption capacity will decline. Losses can be reduced by spraying potassium dihydrogen phosphate solution. Ms. Zheng from Xuzhou, Jiangsu Province asked: The local rice fertilizer has been given a lot, and the seedlings are early, but the yield is not high, and the yield per mu is up to 500 kg. Is this related to potash fertilizer? A: There is a relationship between potassium production and potassium, but potassium must also be combined with nitrogen and phosphate fertilizers. First, the amount of nitrogen applied by local farmers is high, and the proportion of nitrogen fertilizer in the early stage is relatively large. If the nitrogen of base fertilizer and tiller fertilizer accounts for more than 80% of the total nitrogen application amount, it is easy to cause prolonged growth in the early stage, defertilization in the later stage, reduced spike rate, and the grain is not full. Second, the ratio of fertilizer and nutrients is unreasonable, and diazo fertilizer is lighter in terms of phosphorus and potassium. Based on the appropriate amount of nitrogen and phosphorus fertilizer, Mushi 5 to 10 kilograms of potassium chloride, base fertilizer, top-dressing or semi-basal fertilizer once applied, can resist disease resistance, improve the rate of spike formation. Mr. Xiao of Jiaozuo, Henan Province asked: When fertilizing seeds for summer corn, there is no fertilization. When will potassium fertilizer be applied best? Light spray foliar not work? Answer: It is recommended that high-nitrogen-potassium compound fertilizers or nitrogen, phosphorus, and potassium fertilizers be applied as early as possible during the 4-leaf stage. The key is early, because wheat straw nitrogen fertilizer has no aftereffect, early application of nitrogen is conducive to the emergence of seedlings, and phosphorus and potassium fertilizer can not exert its fertilizer effect. As for the late application of foliar fertilizer, of course, there is a role, but the limited nutrients provided cannot meet the high-yield requirements. Ms. Zhang from Donggang, Liaoning Province asked: In the greenhouse, the seedlings are uncovered. The seedlings are yellow, thin and weak. Do you need to increase potash fertilizer? A: The application of potash fertilizer is beneficial to strong seedlings, but of course it is effective. However, if the lack of light in the uncovered sheds causes shortage of carbon, coupled with excessive nitrogen fertilizers leading to carbon and nitrogen metabolism imbalance, it is easy to cause seedling yellow seedlings weak. Therefore, the application of potash fertilizer must be combined with ventilation and light transmittance and proper control of the amount of nitrogen fertilizer. Ms. Xia from Wuhan, Hubei Province asked: Can the tops of tomatoes be topdressed with nitrogen and potassium fertilizers or use compound fertilizers? Do you use generic compound fertilizer (15-15-15)? Answer: As long as the base fertilizer is used reasonably, there is no significant difference between the two practices. However, the compound nitrogen fertilizer should use high-nitrogen-potassium-based sulfur compound fertilizer. Generally do not use general-purpose type, because of its high phosphorus content, not only poor water solubility, but also easy to excessive phosphate. Mr. Li of Datong, Shanxi Province asked: If the grape fruit enlargement period must be given a potassium sulfate or sulfur-based compound fertilizer, why is this? Answer: It is beneficial to the accumulation of sugar in fruits and promote the coloration of grapes to improve the fruit quality.
Wireless Ballbar For Machine Tool,Machine Tool Performance Verification,Ballbar For Sale,Wireless Ballbar
Automated Precision Inc. , https://www.apiasean.com