Three-dimensional treatment of yellow leaves of amaranth

    In the production of amaranth, yellow leaves do not panic. Below, Xiaobian will explain to you what factors are the yellow leaves of the leek and how to prevent it.

    First, the lack of trace elements. The amaranth that produces yellow leaves usually does not perform bottom application or sprays trace elements such as iron, copper, and zinc, and yellow leaves appear due to the lack of this type of element.

    Second, the application of excessive nitrogen fertilizer, the proportion of nitrogen, phosphorus and potassium is out of balance, which in turn will inhibit the absorption and utilization of trace elements by crops, thus forming yellow leaves.

    Third, a large number of fertilizers containing humic acid have been used to change the physical and chemical properties of the soil, showing acidification, which is extremely unfavorable to the growth and development of crop roots, poor absorption and transformation of nutrients, and yellowing of leaves due to malnutrition.

    Fourth, only pay attention to the application of chemical fertilizers, neglect to apply organic fertilizer, soil porosity decreased, permeability decreased, plant roots poor breathing, resulting in malnutrition to produce yellow leaves.

    5. Blind watering, the humidity in the field is too high, and it is very unfavorable for root respiration and nutrient absorption, resulting in yellow leaves.

    Sixth, pests and diseases, especially after the hazard, the roots of the crops have decreased absorption capacity, and the nutrients provided to the leaves are insufficient. In severe cases, they will die dry.

    After the yellow leaves appear in the leek, it is necessary to distinguish the different conditions, and prevent them as early as possible. Usually the following measures can be taken:

    1. Increase the application of organic fertilizer, scientifically and rationally use NPK fertilizer, replenish trace elements, and ensure a balanced supply of nutrients. Wherein leek fertilizer according to need, be administered in raising crop of focus and trace elements P and K may be the middle of, or prior to Koupeng average per acre Chuxing 50 kg of potassium sulfate fertilizer in the late mid-September to October 75 kg, in combination with the application of medium-level element fertilizer 10 kg to 15 kg; in the growing season, the leaf surface is sprayed 2 to 3 times of chlorophyll, spray Shibao and other foliar fertilizer.

    2. Watering at a reasonable time. In order to reduce the amount of watering and the number of times under the condition that the soil in the field is sufficiently moist, the interval between sandy soils should be shorter, and the interval between clay soils should be longer. After watering, the soil is ploughed and reinforced. Soil permeability.

    3. Effectively control pests and diseases, apply high-efficiency and low-toxic pesticides, and reduce the harm of cockroaches. Can in the annual late August to mid-September, following Koupeng 3-5 days were watered once a drug is usually acre farm Dieter 1000-1500 grams or use new farming treasure 1000 grams to 1500 grams, Or water the phoxim when the amaranth grows to a height of 5 cm to 10 cm, 1500 g to 2000 g per mu .

 

 

 

Xi'an Jmlai Bio-Tech Co., Ltd. , https://www.jmlaisarms.com