Q: What are the characteristics of winter wheat base fertilizer? How to use compound fertilizer? Experts: The base fertilizer of winter wheat is characterized by high phosphorus and low potassium, and organic fertilizer is advocated. Therefore, a general-purpose compound fertilizer should be used for general fertility soil, and low-nitrogen and high-phosphorus compound fertilizer should be used for high fertility soil. According to this principle, urea (or ammonium bicarbonate), diammonium (or superphosphate), and potash can be used, and the ratio of nitrogen and nitrogen can be about half. Unless the drought can not be top dressing, do not perform one-time fertilization, the so-called "one bombardment." Q: How do watermelons in greenhouses prevent and control the harm caused by heavy crops? Experts: The fundamental way to overcome the harm caused by heavy crops is to use crop rotation instead of continuous cropping of the same type of crops. In addition, comprehensive measures such as the addition of decomposed organic fertilizers, balanced application of chemical fertilizers, and the use of rainwater to wash salt in summer estuaries, and maintaining suitable temperature and humidity in the shed are also effective. According to another report, proper grafting, such as transplanting seedlings after grafting with watermelon and wax gourd, also has an effect. Q: What should I do if rice is ripe and late? Experts: There are three main methods for preventing and controlling rice greediness: First, rational fertilization should be done so that nitrogen, phosphorus and potassium fertilizers can be used. In particular, nitrogen fertilizer during booting should not be excessively late, and potassium dihydrogen phosphate foliar fertilizer should be properly sprayed in later stages. In the second period, do not plant too late. Third, we must use crop varieties with shorter growth periods. Q: Is it better to apply nitrate nitrogen fertilizer or ammonium nitrogen fertilizer to crops? Experts: Both forms of nutrients are easily absorbed and utilized by crops and are equally effective. However, the application of nitrate nitrogen fertilizer into paddy fields and sandy land is easy to be lost with water, and it will also become a loss of gaseous nitrogen in the paddy fields. However, it is better to apply topdressing fertilizer in the early spring and the dry land in the cold area. Ammonium nitrogen fertilizer is not easy to leaching in soil, and it can be used in dry fields and paddy fields. However, it is easy to decompose and lose alkaline materials. Therefore, it is necessary to emphasize deep-buried soil. Q: What is the reason for the prismatic and hollow of tomatoes in greenhouses? How to prevent it? Experts: The reasons for mature tomato hollows are more complex and can be grouped into three categories: First, sudden changes in growth conditions, such as low temperatures encountered in fruit expansion, root nutrient moisture absorption is blocked, or excessive nitrogen and potassium deficiency; In addition the tomato requires appropriate The temperature is 25°C during the day and 15°C during the night. If the temperature is lower than 5°C or higher than 30°C, especially at night, the fruit development may be abnormal. The second is that the concentration of growth regulators is too high. The third is poor pollination or picking up too early. In response to these conditions, the main methods for preventing the hollow shape of tomato fruit are: balanced fertilization and appropriate irrigation, improved light and temperature conditions within the shed, reasonable pollination and timely picking of the heart, and strict control of the concentration of hormones and other growth regulators. All these are done well, and high quality and high yields are guaranteed. Q: The market often sees exotic cucumbers with large heads and small tails. What is going on here? Experts: Heterogeneous cucumbers and alien tomatoes have similar causes, mainly related to mutations in growth conditions. Therefore, as long as water and fertilizer management is appropriate, strengthen the greenhouse temperature control, scientific pollination and the rational use of growth regulators, it can prevent the production of shaped fruits. PTFE Coated Guide Wire,Guide Wire,hydrophilic guide wire,medical guide wire Anesthesia Medical Co., Ltd. , https://www.trustfulmedical.com
How to use compound fertilizer for winter wheat