滨海稻区水稻不同收获期茎秆抗倒伏能力及其影响因素研究  

Studies on Lodging Resistance of Rice Culms and Influencing Factors in Different Harvest Periods in Coastal Areas

作　　者：李旭[1] 毛艇[1] 付立东[1] 王宇[1] 隋鑫[1] 任海[1] 李宝军[1] 

机构地区：[1]辽宁省盐碱地利用研究所,辽宁盘锦124010

出　　处：《中国农学通报》2011年第27期50-54,共5页Chinese Agricultural Science Bulletin

基　　金：辽宁省科技攻关项目"水稻高产高效栽培技术集成与示范"(2009201003)

摘　　要：为了探求盘锦稻区各主栽品种最佳收获期,以盘锦稻区主栽品种‘盐丰47’、‘盐粳218’及应用前景较好新品系H50、‘盐粳456’及H199为试材,结合盘锦实际收获期,于10月5日、10月15日及10月25日进行分期收获,并测定其株高、节间茎粗等形态指标,对不同收获时期各品种倒伏指数变化及其与各形态指标相关性进行研究。结果表明:倒伏指数表现趋势为S3>S4>S2>S1,这说明发生倒伏的薄弱环节为S3节间;10月5日至10月25日倒伏指数表现为先降低后升高的趋势,10月25日倒伏指数最大,其抗倒最弱。各形态指标中株高与S4至S1倒伏指数均成正相关,与S3倒伏指数达到极显著正相关;壁厚与倒伏指数相关性趋势为负相关,但均未达到显著水平;茎粗与倒伏指数均为负相关,其中与S4及S1相关性达到显著水平。最终得出测定品种最佳收获期为10月15日。＇ Yanfeng47 ＇,＇ Yangeng218 ＇,＇ Yangeng456 ＇ and better application prospect new lines H50 and H199 were used as materials,with the actual harvest of Panjin,at October 5 th,15 th and 25 th phased harvest,measuring plant height,culm diameter of elongation internode and other morphological indexes,studies on lodging resistance of rice culms and influencing factors in different harvest periods.The results showed that the lodging index was S3S4S2S1,it was shown that the weak link of occurring lodging was S3 internode.From October 5 th to October 25 th the lodging index showed that decreasing first and then increasing later,the lodging index was the maximum and the lodging resistance was the minimum of October 25 th.During morphological indicators,plant height with the lodging index of S4 to S1 had positive correlation,with the lodging index of S3 had very significantly correlated,wall thickness and the lodging index was negative correlation,but it didn＇t reach significant level.Stem diameter and the lodging index was negative correlation,with S4 and S1 reached significant level.General analysis,the best harvest time was the October 15 th.

关 键 词：水稻 收获 倒伏指数 

分 类 号：S3[农业科学—农艺学]