中国水稻科学Issue(5)：534-540,7.DOI:10.3969/j.issn.1001-7216.2014.05.011
灌浆乳熟期土壤水势对苏打盐渍土水稻产量及生理性状的影响
Effects of Soil Water Potential at Grain Filling-Milky Stage on Rice Yield and Physiological Traits in Saline-alkali Soil
摘要
Abstract
To explore the effects of soil water potential at grain filling-milky stage on rice yield and physiological traits in saline-alkali soil,we measured grain yield,dry matter production,leaf physiological traits and leaf area under soil water potentials of 0kPa(WP0 ),- 1 5 kPa(WP-1 5 ),- 30 kPa(WP-30 )and CK (continuously flooded).The results showed that yield of rice differed significantly under different soil water potentials,being the highest under WP0 ,while being the lowest under WP-30 .Compared with the CK,WP-1 5 and WP-30 ,rice grain yield under WP0 increased by 4.03%,1 9.90 % and 26.05 %,respectively and the increased 1000-grain weight and seed setting percentage may contribute to its higher grain yield.The root dry matter production under WP0 was significantly higher than that under CK at grain filling-milky stage.The dry matter accumulation of root and abroveground part under WP0 were significantly higher than those under CK ,WP-1 5 and WP-30 after 1 5 days of rewatering.With the decreasing soil water potential,the leaf relative water content and leaf area index decreased with insignificant difference.The content of proline and electrical conductivity under CK were significantly lower than those under WP0 ,WP-1 5 and ,WP-30 .The chlorophyll contents showed a trend of WP0 >CK> WP-1 5 > WP-30 .The 1000-grain weight,seed setting percentage, root activity,dry matter production and chlorophyll contents of rice in soda alkali-saline soil increased under moist irrigation at the grain filling-milky stage,so in soda alkali-saline soil continuously flooded irrigation is not necessary. Moist irrigation method could improve not only rice yield ,but also water resource-use efficiency.关键词
苏打盐渍土/水稻/土壤水势/产量/生理性状Key words
soda alkali-saline/rice/soil water potential/yield/physiological trait分类
农业科技引用本文复制引用
耿艳秋,金峰,朱明霞,高显颖,王帅,华霜,邵玺文,张连学..灌浆乳熟期土壤水势对苏打盐渍土水稻产量及生理性状的影响[J].中国水稻科学,2014,(5):534-540,7.基金项目
吉林省科技支撑计划重大科技攻关专项(20130204036NY) （20130204036NY）
国家科技支撑计划重点资助项目(2009BADB3B03) （2009BADB3B03）
吉林省现代农业产业技术体系资助项目 （）
吉林省农业综合开发科技示范资助项目 （）
吉林省产业技术创新战略联盟项目(20130305035NY) （20130305035NY）
