土壤酸化对晚稻产量的影响及品种耐酸性比较

Effects of Soil Acidification on Yield of Late Rice and Differences in Acid Resistance among Varieties

以23个晚稻品种为材料，在湖南省长沙县进行大田试验，研究土壤酸化对晚稻产量的影响，并比较了品种耐酸性差异。结果表明：（1）各品种在普通大田产量为5226.6～9202.1 kg／hm^2，在酸化大田产量为3643.2～7714.8 kg／hm2，品种间差异显著；（2）与普通大田比较，酸化大田条件下岳优6135、华优18、金优284和Ⅱ优46产量提高，增幅为3.24％～26.33％，其他品种产量均下降，降幅为2.04％～56.79％；（3）根据产量变化的显著性，供试品种可分为3种类型，五丰优 T025、荆楚优148、岳优6135、深优9586、湘丰优103、中优288、农香18、汕优432、Ⅱ优6号和中9A ／R10402属酸性敏感型，五优308、准两优608、丰源优227、丰优1167、丰源优299、T 优272、中9A ／R9963属酸性中间型；岳优9113、金优284、深优9588、华优18、Ⅱ优46和Ⅱ优3027属酸性迟钝型。

Effect of soil acidification on yield of late rice was studied and acid resistance of late rice varieties were com-pared with 23 late rice varieties as materials in Changsha county,Hunan province.The results indicated that （1）the differ-ence in yield among varieties was obvious,yield in common field was among 5 226.6 -9 202.1 kg/hm^2 ,and yield in acidi-fy field was among 3 643.2 -7 714.8 kg/hm^2.（2）Compared with common field,yield of Yueyou 6135,Huayou 18,Jiny-ou 284 and Ⅱyou 46 was increased by 3.24% -26.33% in acidify field,while yield of other varieties was decreased by 2.04% -56.79% in acidify field.（3）According to the significance of yield change,the tested varieties were divided into three types,Wufengyou T025,Jingchuyou 148,Yueyou 6135,Shenyou 9586,Xiangfengyou 103,Zhongyou 288,Nongxiang 18,Shanyou 432,Ⅱyou No.6 and Zhong 9A /R10402 belonged to acidity sensitive type,Wuyou 308,Zhunliangyou 608, Fengyuanyou 227,Fengyou 1167,Fengyuanyou 299,Tyou 272 and Zhong 9A /R9963 belonged to intermediate type,and Yueyou 9113,Jinyou 284,Shenyou 9588,Huayou 18,Ⅱyou 46 and Ⅱyou 3027 belonged to obtuse type.