【摘要】 2年试验结果表明,秸秆覆盖与遮荫均可提高土壤含水量2.4％～4.0％,降低土壤温度2.1～3.3℃。与遮荫相比,秸秆覆盖后植株高度变矮,叶片繁茂,茎秆粗壮,分枝数多,产量增加5％～14％,气孔密度、叶片厚度、气孔开张度较大;遮荫后叶绿素含量增加,硝酸还原酶活性、琥珀酸还原酶活性及产量均下降。更多还原

【Abstract】 Two years’ experiments show that both the mutch with wheat shoot and the shade with corn shoot can improve the soil moisture by about 2.4%-4.0%, at the same time decrease the soil temperature by 2. 1 - 3. 3℃ . Compared with the shade, the mulch with wheat shoot can make the plant stronger and shorter, the shoot and leaf thicker, shoot number and leaf number higher, stomata density lower but stomata aperture bigger, the net photosynthesis-rate and NR activity higher, and yield increase.更多还原