通过水稻盆栽试验，在高低两种自然富硒土壤上种植3种水稻。结果发现，水稻籽粒Se含量与土壤中Se含量呈正相关，而土壤硒含量过高会降低水稻籽粒的产量。在添加Cd下，高富硒土种植的博优998、秋优998、金稻优998等水稻籽粒Cd含量比低富硒土分别降低了26．99％、10．28％、13．48％，说明土壤中适量的Se对水稻籽粒吸收Cd有拮抗作用。另外，秋优998富集Se、Cd的能力最强，生物产量最低，金稻优998达到富硒效果，而富集Cd的能力最弱，且生物产量较高，在筛选品种时，应优选金稻优998。

By pot rice experiments, 3 kinds of rice including Boyou 998, Qiuyou 998 and Jindaoyou 998 were planted in the natural Selenium-rich soils with high Se concentration and low Se concentration respectively. The results indicated that positive correlation was found between Se content in the rice grains and that in the soils. However, the yield of rice grains decreased when Se content in the soils was in a high level. After addition of Cd, the results showed that the content of Cd in the rice grains of Boyou 998, Qiuyou 998 and Jindaoyou 998 planted in the natural Se-rich soils in a high level was reduced by 26.99%, 10.28% and 13.48% respectively compared to those planted in the natural Se-rich soils in a low level, which indicated the antagonism of appropriate amount of Se in the soils towards Cd absorption. Moreover, Qiuyou 998 had the strongest enrichment of Se and Cd but with lowest yield. Jindaoyou 998 had a certain effect on Se collection but with lowest collection capacity

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/hm2 ,and yield in acidi-fy field was among 3 643.2 ~7 714.8 kg/hm2.(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

为了选育高配合力水稻新恢复系,利用香稻/CDR22的F5代中间材料,与生产上强优势恢复系蜀恢527、明恢86聚合杂交,经多年异地选择,聚合多亲本优势基因,育成了水稻新恢复系黔恢785。该恢复系具有分蘖好、恢复力强、配合力高、花粉量大等特点,利用其配组的金优785、湘菲优785、两优6785新品种已通过贵州省审定,其中金优785获农业部超级稻认定;全优785完成南方稻区长江上游国家水稻区域试验,进入2014年审定程序。

For the sake of breeding new restorer lines with high combining ability,the intermediate materials of F5 germination of the cross of rice/CDR22 were crossed by Shuhui 527 and Minghui 86,after years of selection in different places,a new rice restorer line Qianhui 785 was bred with more parents’ dominant genes.This restorer line was of good tillers,strong resilience,high combining ability,a large number of pollens.The combination of Jinyou 785,Xiangfeiyou 785 and Liangyou 6785 were approved by Guizhou Agricultural Variety Approval Commission,the Jinyou785 was invested super rice by the Ministry of Agriculture;New combination of Quanyou785 completed the south area of Yangtze river upstream regional test,which would get into the approval procedures in 2014.

采用人工模拟低温条件，以株两优505、金优268、中嘉早17和株两优819等4个早稻品种为试验材料，研究低温处理期和常温恢复期间4个品种耐寒生理指标的变化。结果表明，株两优505经低温胁迫后各项指标均表现为耐寒特征，且常温恢复期电导率和 MDA 含量大幅降低，叶绿素和可溶性蛋白含量上升，酶活性增强，表明其幼苗低温胁迫后能恢复正常生长，其耐寒性高于其他3个品种；中嘉早17经低温胁迫后的电导率和 MDA 含量大幅增加，且在常温恢复期仍维持高水平，表现为冷敏感特征，说明其幼苗低温胁迫后受到严重损伤，其耐寒性差；金优268和株两优819介于两者之间，耐寒性中等。

Four rice cultivars were taken as tested materials to measure the physiological indexes at the seedling stage under the artificially low temperature condition.The results showed that Zhuliangyou 505 was characteristic on cold toler-ance.Electrolyte leakage and MDA decreased,chlorophyll and soluble protein content increased,SOD activity enhanced in normal growth condition.It indicated that Zhuliangyou 505 seedlings returned to normal growth.Zhongjiazao 17 was charac-teristic on cold sensitivity.Electrolyte leakage and MDA increased significantly under cold stress and maintained high lever in normal growth condition.It indicated that Zhongjiazao 17 seedlings injured badly.The physiological indexes of Jinyou 268 and Zhuliangyou 819 changed in between.

引进24个晚季杂交稻新品种在上杭进行大田展示及简比试验，结果表明：Y两优5867比对照增产21．24％，花2优3301比对照增产15．3％，金农2优3号比对照增产5．96％，这3个品种在上杭种植田间表现综合性状好，产量高，生育期适中。并对各参试品种的生育期、经济性状、抗逆性等进行了评述。

Twenty-four new rice varieties were introduced and planted in Shanghang county in 2012, The results showed that Y liangyou 5867 was increased by 21.24% compared with CK, Hua2you 3301 was increased by 15.3% compared with CK, Jinnong2you 3 was increased by 5.96% compared with CK. In this paper, we introduced economic characters and stress resistance of the tested varieties.