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2004年晚季在大田条件下,对免耕抛秧、常耕抛秧、稻草还田免耕抛秧和稻草还田常耕抛秧的立苗速度与立苗期的根系生长及其产量进行了比较。结果表明,免耕抛秧比常耕抛秧增产7.64%,稻草还田免耕抛秧与稻草还田常耕抛秧产量差异不大,但分别比常耕抛秧高10.72%和8.22%。免耕抛栽秧苗前期立苗速度较慢,后期立苗速度较快,总的立苗时间较常耕抛栽秧苗多1d。免耕使立苗期根系及分枝数量、根系的总长度和根毛区长度及根系氧化能力下降。但是,稻草还田增加了立苗期根系及分枝数量和根系长度,提高了根系氧化能力,因而对抛栽水稻立苗有很好的促进作用,其促进作用在免耕条件下更明显。
In the late 2004 under field conditions, the no-tillage and throwing seedlings, paddy throwing, straw returning to the field no-tillage throwing and straw throwing seedling standing seedling speed and seedling root growth and yield A The results showed that no-tillage and throwing seedlings increased yield by 7.64% compared with that of conventional tillage and throwing rice, respectively. No-tillage throwing planted seedlings pre-stand stalks slower, late stand stalks faster, the total time for standing seedling throwing planted more than 1d. No-tillage led to the establishment of seedling root and branch number, root length and length of root hair area and root oxidation decreased. However, straw returning increased the number of root system, branch number and root length at seedling stage, and increased the root oxidation ability, which promoted the seedling throwing and transplanting of rice seedlings. Its promotion effect was more obvious under no-tillage conditions.