土壤酸化对晚稻产量的影响及品种耐酸性比较

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。

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

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.