玉米秸秆还田量对小麦生理生态特征和产量的影响

Effects of Corn Stalk Returning on Physiological and Ecological Characteristics and Yield of Wheat

研究玉米秸秆还田量对小麦基本苗数、产量,以及苗期、抽穗期和灌浆期3个不同生长时期小麦SOD酶活性和MAD含量的影响,从而获得适宜小麦的玉米秸秆还田量。结果表明,玉米秸秆还田量小于7 000 kg/hm^ 2对小麦基本苗数影响不明显;秸秆还田量大于 10 500 kg/hm ^2时,小麦基本苗数随秸秆还田量的增加呈显著降低趋势。玉米秸秆还田量为7 000 kg/hm ^2,小麦SOD活性与产量均提高且小麦MAD含量降低较理想。

By studying the effects of corn stalk returning on the total seedling number, yield and seedling stage, heading stage and filling stage of wheat, the effects of wheat straw stalk enzyme activity and MAD content were summarized. The results showed that when the amount of corn stalk returned to the field was less than 7 000 kg/hm ^2, the effect on the basic seedling number of wheat was not obvious. When the amount of wheat straw was more than 10 500 kg/hm ^2, the number of basic seedlings of wheat decreased significantly with the increase of straw returning amount. The corn stalk returning amount suitable for increasing the activity and yield of wheat SOD and reducing the MAD content of wheat is ideally 7 000 kg/hm^ 2.