冬种黑麦草最终割草时间对早稻生长发育和产量的影响

Effects of the last cutting time of winter cropping Italian ryegrass in paddy on the growth, development and yield of subsequent rice

通过田间试验研究了对冬种黑麦草最终刈割时间对早稻生长发育及产量的影响，结果表明：在所设计的４种时间间隔中，间隔１５ｄ的处理最为理想，对早稻的分蘖、生长高度、有效分蘖、穗长、千粒重和产量等性状在该处理条件下表现最佳。因此，建议ＩＲＲ系统中黑麦草和早稻前后作采用１５ｄ的间隔时间。

A field experiment was carried out for investigating the effects of the last cutting time of winter cropping Italian ryegrass (Lolium multiflorum) in paddy on the growth, development and yield of subsequent rice (Oryza sativa). Four treatments, which were 2 days, 10 days, 15 days and 20 days intervals between Italian ryegrass and rice, were conducted. The results showed that the treatment of the 15 day interval was best for tillering, growing heading and gaining grain yield of the subsequent rice.