论文部分内容阅读
为探讨土壤耕作方式对南方双季稻区水稻产量形成特性的影响,2015年以‘陵两优211’与‘威优46’为早、晚稻供试品种,在湖南湘潭开展了双季免耕、双季翻耕、双季旋耕、早旋晚免、早翻晚免等5种土壤耕作方式的比较试验。结果表明,早稻产量表现翻耕>旋耕>免耕的趋势;晚稻产量以双季翻耕处理最高,双季旋耕处理最低,3个晚季免耕处理间无显著差异;两季总产量以双季翻耕处理最高,早翻晚免处理次之,其他依次为双季免耕、早旋晚免与双季旋耕处理。翻耕处理产量最高的原因在于分蘖较多,有效穗数较高,生育后期叶面积、叶片叶绿素含量与净光合速率较高。与双季翻耕处理相比,早翻晚免处理产量有所下降(降幅7.29%),但其具有省工省力、节约能源等优点,可在南方双季稻田推广应用。
In order to investigate the effect of soil tillage on the yield formation characteristics of rice in the southern double cropping rice region, in 2015, ’Lingliangyou 211’ and ’Weiyou 46’ were used as the early and late rice cultivars, and double crop no-till , Double season tillage, double quarter tillage, early rotation late free, early late late free five kinds of soil tillage comparison test. The results showed that the yield of early rice showed the trend of tillage> rotary tillage> no tillage. The yield of late rice was the highest in double season tillage, lowest in double season tillage, and no significant difference in three late tillage tillage treatments. The highest tillage in double seasons was the second tillage and the second tillage was the second tillage, followed by the double tillage and no tillage in the second season, the late rotation and the double tillage in the second quarter. The reason for the highest yield of plowing treatment is that there are more tillers, higher effective panicle number, higher leaf area, leaf chlorophyll content and net photosynthetic rate in later growth period. Compared with double-seeding tillage, the yield of early late late letdown treatment decreased by 7.29%, but it has the advantages of saving labor, saving energy, etc., and can be popularized and applied in the southern double cropping paddy field.