耕作覆盖对宁南旱区土壤团粒结构及马铃薯水分利用效率的影响

苗芳芳,勉有明,普雪可,吴春花,周永瑾,侯贤清

Effects of Tillage with Mulching on Soil Aggregate Structure and Water Use Efficiency of Potato in Dry-Farming Area of Southern Ningxia

MIAO FangFang,MIAN YouMing,PU XueKe,WU ChunHua,ZHOU YongJin,HOU XianQing

表2 不同处理下0—40 cm土层>0.25 mm粒径土壤团聚体数量（DR0.25 mm, %）

Table 2 Content of >0.25 mm aggregates at 0-40 cm soil layer under different treatments

处理 Treatment 2014 2015 2016 0-20 cm 20-40 cm 0-20 cm 20-40 cm 0-20 cm 20-40 cm BT 70.39 72.25 70.39 72.25 70.39 72.25 NT BM 64.79c 64.62c 71.19b 70.88b 72.98c 75.02b JM 68.56b 70.64b 75.88a 76.92a 79.37a 80.18a DM 72.16a 79.16a 72.50b 70.58b 75.35b 79.56a ST BM 69.92c 76.52c 72.18b 68.60ab 74.38c 74.60c JM 86.61a 84.67b 74.90a 69.93a 80.81a 85.80a DM 80.95b 89.10a 72.72b 68.41b 77.01b 77.36b CT BM 74.06c 73.35a 69.97b 64.78b 70.76c 72.60b JM 78.50b 72.35a 75.56a 69.86a 79.54a 80.34a DM 85.74a 73.20a 72.70a 69.43a 77.13b 78.45a F T 228.10** 108.03** 16.03* 58.35** 14.35* 23.27** M 330.36** 276.32** 93.92** 19.25** 233.24** 94.67** T×M 65.52** 76.71** 74.14** 21.14** 7.63** 9.50**