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小麦在向高产过度中,群体和个体的矛盾较为突出,直接影响产量的提高.密度是群体形成的基础,肥料也影响群体的发展.通过密度与施氮量试验,探讨出最佳的密度和施氮量,使产量构成的三因素得以协调发展.在基础肥力较高(不施肥亩产200公斤以上) 的高产麦田,选用分蘖成穗率较高的宿科808,在冬春雨水较多的条件下,亩施氮素12公斤,每亩基本苗可降低到8万,走分蘖成穗为主的途径.在基础肥力比较低的中低产麦田,成穗途径主要靠适当增加苗数,走主茎成穗为主、争取部分分蘖成穗的途径.
In the process of overproducing wheat, the contradiction between the population and the individual is more prominent, which directly affects the increase of yield.Density is the foundation of the formation of the group and fertilizer also affects the development of the population.Through the test of density and nitrogen application, the optimal density and The three factors that make up the yield can be developed in a coordinated way.In the high-yielding wheat field with higher basic fertility (no fertilization more than 200kg per mu), the higher tillering rate of Suer 808 was selected, Under the conditions of acreage of nitrogen fertilizer 12 kilograms, the basic seedlings per acre can be reduced to 80,000, taking the tiller as the main path.In the low fertility of the basic low-yielding wheat field, the earliest approach by increasing the appropriate number of seedlings, Take the main stem into the main spike, fight for some tillers into the ear path.