稻鸭共生对早稻根系特性与产量及其构成因素的影响

Effects of Rice-Duck Symbiosis on Root Characteristics, Yield and Its Components in Early Rice

为研究规模化稻鸭共生对水稻根系特性与产量及其构成因素的影响,于2019年4~7月在湖南省浏阳市开展了田间大区比较试验.结果表明,相比对照(常规生产模式),稻鸭共生水稻分蘖盛期根长、根干重和根冠比提高,根体积与单茎伤流强度显著提高,分别提高了200.00%和77.58%;齐穗期根干重和单茎伤流强度降低,根长、白根数、根体积和根冠比显著降低,分别降低了38.13%、47.24%、30.76%和36.84%.稻鸭共生提高了水稻产量,较对照提高9.53%;相比对照,稻鸭共生显著提高了单株有效穗数、每穗总粒数和结实率,分别提高了17.37%、19.59%、3.19%,但显著降低了千粒重,较对照降低9.40%.因此,规模化稻鸭共生可以促进水稻生长,提高水稻产量.

In order to study the effects of large - scale rice - duck symbiosis on rice root characteristics,yield and its com-ponents, a comparative experiment in the field of large areas was carried out in Liuyang city,Hunan province from April to July .2019. The results showed that compared with the control (conventional production mode), the root length, root dry weight and root - shoot ratio of rice - duck symbiotic rice increased .and the root volume and single - stem injury intensity increased significantly, increasing by 200.00% and 77. 58%.respectively.The root dry weight and single stem wound flow intensity decreased at the heading stage, and the root length, white root number, mot volume and mot - shoot ratio decreased significantly .which were decreased by 38. 13%,47. 24%,30. 76% and 36. 84%.respectively. Rice - duck symbiosis increased rice yield, which was 9. 53% higher than that of the control. Compared with the control .rice - duck symbiosis significantly increased the effective panicle per plant, the total number of grains per panicle and the seed setting rate,which increased by 17. 37%, 19. 59%.and 3. 19%.respectively, but significantly reduced the 1000 - grain weight, which was 9. 40% lower than the control. Therefore, large - scale rice - duck symbiosis can promote rice growth and increase rice yield.