中国农业科学(英文版)Issue(1)：107-115,9.
Water-requirement Characteristics and Water-saving Irrigation Indices of Dry-raised Rice Seedlings in Paddy Field
Water-requirement Characteristics and Water-saving Irrigation Indices of Dry-raised Rice Seedlings in Paddy Field
YANG Jian-chang 1WANG Wei 1WANG Zhi-qin 1LIU Li-jun 1DING Zhi-jia 2ZHU Qing-sen1
作者信息
- 1. Agricultural College, Yangzhou University, Yangzhou 225009
- 2. Seed Station of Yiling Township, Jiangdu County
- 折叠
摘要
Abstract
The dry-raised seedlings (D-RS)of rice had obvious superiority in tillering and growth after transplanting. Especially under the condition of water-saving irrigation or low soil moisture, D-RS had more productive tillers, higher dry matter accumulation, larger grain-filling rate, slower senescence of leaves and stronger root activity during ripening, and higher grain yield, compared with the moist-raised seedlings (MRS). D-RS had smaller yield reduction than M-RS when subject to heavy water stress. The results suggested that D-RS had the ability to adapt to lower soil moisture in paddy field. Basedon the response of D-RS to soil moisture at each growth stage, the water-saving and high-yielding irrigation indices through controlling lowlimit soil water potential were proposed, i.e. soil water potential was - 15 - - 20 kPa from the recovery to the criticalleaf-age of productive tillering, - 20 - - 40 kPa from the critical leaf-age of productive tillering to secondary branch-differentiating stage, - 15 - - 25 kPa from secondary branch-differentiating stage to 20 days after heading and - 25 - - 35 kPa from 21 to 45 days after heading.关键词
Rice/Dry-raised seedlings/Soil water potential/Irrigation indicesKey words
Rice/Dry-raised seedlings/Soil water potential/Irrigation indices分类
农业科技引用本文复制引用
YANG Jian-chang,WANG Wei,WANG Zhi-qin,LIU Li-jun,DING Zhi-jia,ZHU Qing-sen..Water-requirement Characteristics and Water-saving Irrigation Indices of Dry-raised Rice Seedlings in Paddy Field[J].中国农业科学(英文版),2001,(1):107-115,9.
