The Cold Dew Festival has arrived and preparations for wheat planting are about to begin. This year's cotton is affected by the continuous high temperature and drought, and the boll opening is earlier. Most cotton fields can broadcast wheat directly after the cotton is pulled. Although wheat was changed from the previous reserved cotton line to full-fledged live broadcasting, the output has increased significantly, but the output is not stable enough. One of the reasons is that it is extremely relevant to fertilization.
Cotton field wheat can not be blindly applied base fertilizer, especially in the early years of cotton harvest this year, should not generally use the base fertilizer, if the basic base fertilizer, then meet the continued high temperature in autumn and winter, wheat will appear before the Spring Festival jointing The problem. This is because such cotton in cotton fields generally uses peach fertilizer in the middle or late July. After the drought, most of the peach fertilizer remains in the soil and is not released. After sowing wheat, they encountered good lyricism and high fertility in the field. Wheat is very prone to grow in jointing years ago.
When wheat is jointed prematurely, the nutrient will grow vigorously and the leaf area coefficient will be too large to consume nutrients. In the event of persistent rain, the stalks will be easily fragile due to the fragility of the stalks; the three will cause serious damage to the leaves in the field; It will lead to serious reduction in production and reduce starch quality. According to the author's multi-point sampling, the weight of the crushed wheat was only 29.1 grams, 13.1 grams lower than that of the robust wheat, and the value of the commodity was extremely poor.
Years of experience and lessons suggest that we must prevent the jointing of wheat before the year and lodging after years. One can adopt agricultural measures and the second can use chemical control methods to control.
In terms of agricultural measures, the first is to use lodging-resistant wheat varieties; the second is to control the amount of base fertilizer, and the application of peach fertilizer is more adequate than that of the cotton field can not apply base fertilizer or less base fertilizer; third is the use of stone rolling suppress the growing wheat at the seedling stage. The fourth is to join the jointing stage of jointing stage fertilizer, especially the high-fertilized wheat field is not suitable for the application of joint fertilizer; five is to open a good ditch, clear water, dark water, promote hair roots.
In chemical regulation measures, mainly through the application of plant growth regulators, resulting in impaired biosynthesis of endogenous gibberellin in wheat, control cell elongation, but does not inhibit cell division, control vegetative growth, promote reproductive growth, so that the wheat root system Developed, dense leaves and thick leaves, dark green leaves, enhance resistance to lodging. For the more prosperous wheat seedlings, one can spray the delayed plant growth regulator Chewsonine or Dinogenamine from the jointing stage to the booting stage of wheat, and use 10-20 ml per mu, or dilute amine 2. 5 ~ 5.0 grams, 100 pounds sprayed with water; two can be returned to green in wheat to the jointing period, with 25 to 30 mg per acre Zhuang Fengan, watered 50 to 60 pounds; three can be before the jointing of wheat Spray 15% paclobutrazol wettable powder about 10 days, 30-40 grams per acre, nearly 50 grams per acre, and 60 to 80 pounds of water; four can spray 0.15% at the beginning of the jointing of wheat. ~ 0.3% of chlormequat solution, watered 100 ~ 140 kg. When spraying the above chemical regulators, one must apply strictly according to the amount of drug, two should not be sprayed without spraying, and three should choose to spray on sunny afternoons. Once it is found that the application concentration is too large to inhibit wheat, it can be sprayed. 500 to 800 times Huimanfeng lifted the phytotoxicity.
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