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3 耕作覆盖措施下马铃薯关键生育时期土壤蓄水量

Table 3 Soil water storage in key growth period of potato under tillage with mulching measures (mm)

耕作方式 Tillage method 覆盖措施 Mulching measure 2014 2015 2016 现蕾 Budding 块茎形成 Tuber initiation 块茎膨大 Tuber expansion 现蕾 Budding 块茎形成 Tuber initiation 块茎膨大 Tuber expansion 现蕾 Budding 块茎形成 Tuber initiation 块茎膨大 Tuber expansion NT BM 345.58c 303.26c 300.79c 413.86c 326.82c 311.05c 354.20c 330.64b 319.60c JM 380.64a 363.26a 344.31a 469.37a 381.44a 357.70a 441.51a 412.40a 375.53a DM 372.48b 322.12b 323.25b 441.31b 366.32b 340.19b 425.04b 408.90a 356.10b ST BM 368.24c 325.80c 302.28c 430.11c 328.34c 311.22c 361.34c 334.14c 320.01c JM 431.78a 382.92a 360.90a 466.99a 369.93a 344.89a 425.04a 437.26a 395.96a DM 404.92b 353.21b 332.08b 451.30b 352.54b 336.49b 409.31b 409.93b 365.42b CT BM 363.98c 299.78e 302.78c 398.87c 325.59c 307.07c 349.30c 330.21c 318.93c JM 426.40a 363.40a 330.24a 445.01a 370.29a 338.02a 417.88a 406.85a 389.76a DM 406.60b 329.48b 318.92b 439.34b 361.37b 329.43b 408.61b 395.03b 371.87b F T 9.20* 14.49* 10.24* 13.34* 11.69* 9.23* 9.23* 13.50* 11.52* M 254.79** 219.41** 173.3** 138.63** 568.12** 484.03** 379.94** 513.99** 595.73** T×M 23.41** 4.49** 7.61** 6.03** 7.01** 8.59** 6.76** 5.88** 6.22**