干旱地区农业研究2017，Vol.35Issue(3)：7-12,6.DOI:10.7606/j.issn.1000-7601.2017.03.02
分蘖期干旱胁迫下养分管理对双季晚稻生长及产量的调控效应
Effect of nutrient management on the growth and yield of double cropping late rice under drought stress during tillering stage
摘要
Abstract
In order to promote rice production in the harsh environments of mountain and hills areas,we conducted five nutrient management methods including adding K fertilizer + spraying clean water(T1),foliage spraying 0.2％ ZnSO4(T2),adding K fertilizer + foliage spraying 0.2％ ZnSO4(T3),raising the ratio of N fertilizer in elongation stage + spraying clean water(T4),conventional fertilization + spraying clean water (CK),with the objective of elucidating the effect of the nutrient management methods on the growth and development,yield components and yield of double cropping late rice under drought stress condition.The results revealed significant difference among the five nutrient management methods () the growth and development and yield of double cropping late rice under drought stress condition during tillering stage,with the order of T3 ＞ T1 ＞ T2 ＞ T4 ＞ CK.T3 effectively increased tiller number,the seedling peak value,and number of effective tillers,significantly elevated the SPAD value,the photosynthetic rate and transpiration rate of leaf,root activity at elongation stage and full heading stage,with a range of increase by 2.19％ ～ 25.22％ compared with CK.In addition,it significantly increased single plant dry matter weight above ground at stem elongation stage and full heading stage and maturity stage,improving the dry matter accumulation of plant by 5.47 ％ and 8.05 ％ and 7.22 ％ compared with CK,respectively.Furthermore,the yield components including the effective panicles number per hectare,filled grain number per panicle,total grain number per panicle and seed setting rate were significantly enhanced.Finally,the highest yield level was achieved for T3 under drought stress,reaching 10.07 t· hm-2 and being 6.34％,7.70％,14.17％ and 25.56％ higher than T1,T2,T4,and CK respectively.关键词
双季晚稻/干旱胁迫/养分管理/生长发育/产量Key words
double cropping late rice/drought stress/nutrient management/growth and development/yield分类
农业科技引用本文复制引用
关贤交,彭春瑞,陈先茂,陈金,邱才飞,钱银飞,邵彩虹,邓国强,谢江..分蘖期干旱胁迫下养分管理对双季晚稻生长及产量的调控效应[J].干旱地区农业研究,2017,35(3):7-12,6.基金项目
国家“十二五”科技支撑计划项目(2013BAD07B12) （2013BAD07B12）
江西省青年科学基金(20132BAB21402) （20132BAB21402）
