What causes wheat yellow leaves to die

1. Variety sensitive to potassium deficiency: There are more wheat varieties that appear yellow, but the first to appear yellowing and yellowing area is limited to a few varieties, these varieties may be sensitive to potassium deficiency.

2, early broadcast leggy: Where the emergence of yellow wheat dead, most of the seeds before and after cold exposure, 15 days earlier than in previous years. Due to the earlier date of sowing, coupled with adequate rainfall, it is generally a phenomenon of leggy, and then it will yellow and die. However, the wheat replanted on the same plot was neither leggy nor erythematous.

3, the soil is seriously deficient in potassium: For many years, no manure and potash or potassium application has been applied. The continuous high yields in the summer and fall, and the high consumption of land, especially the fact that the potassium in the soil has reached the point where it does not work, has failed to make up for it in time.

4. Partial application of nitrogen fertilizer in winter sowing: Partial application of nitrogen fertilizer causes a serious imbalance in the proportion of nitrogen and potassium. Due to the high price of potash this year, combined with the combined effects of various factors, the farmers began to reduce the amount of potash fertilizer by deliberately or unintentionally from the start of autumn crop fertilization. Many farmers in the case of nitrogen fertilizer, but also blindly increase nitrogen fertilizer, to make up for the lack of potassium fertilizer, resulting in excess nitrogen, potassium deficiency, a serious imbalance in the proportion of nitrogen and potassium, resulting in a large area of ​​yellow wheat withered. The survey found that as long as no partial application of nitrogen fertilizer, where the use of famous potassium fertilizer and famous compound fertilizer wheat, regardless of sowing date sooner or later, no matter what breed, there are very few symptoms of yellowing. Http://

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