关键词: 小麦, 小麦, 种植密度, 群体性状, 产量, 渭北旱作区

Abstract: In order to reach a good effect on straw returning, reasonable measure of should be taken of straw returning. By different processing methods of straw returning, the article made analysis on variance and multiple comparison with agronomic characters and yield of soybean, the results showed that the plant height,single node number, pod number, grain number and yield of those three treatments were on the increasecomparing with the common ground treatments, those three treatments were the straw mulching, soil returning,and the burning of straw. The straw soil returning treatment was the best, and the different between them reached significant or highly significant. The yield of straw soil returning was more than 32.31% compared with common ground, the yield of straw mulching was more than 22.50%, the yield of burning of straw was more than 13.65%. The yield of straw soil returning was the best, because of the good effect on well-composted, it would promote an increase in soil fertilizers, and absorb the nutrients fully for soybean.