摘要
通过田间试验,对比不同灌溉模式与施肥方式的组合对单季水稻分蘖、根系生长、叶面积指数、产量和水分生产率的影响。研究表明:节水灌溉模式下(薄露灌、间歇灌),水稻分蘖优于常规灌溉,并且3次施肥处理的最终分蘖量好于2次施肥;水稻根系长度和根毛总量均大于常规灌溉;不同灌溉模式对水稻叶面积指数影响不显著;节水灌溉加3次施肥处理的实测产量略大于常规处理,每公顷增产150~450 kg。另外,节水灌溉模式可显著提高单季水稻的水分生产率,生育期用水可减少10%~30%。
Through field experiment,we compared the influences of different combinations of irrigation and fertilization on the tiller,root growth,the leaf area index,yield,and water productivity of single-cropping rice.The aim of this study was to explore the mechanism of water conservation and yield increasing of single-cropping rice.The results show that the tiller of rice under water-saving irrigation(thin layer and dry irrigation or alternate dry and wetting) is better than conventional irrigation,and the tiller of three-split fertilization is better than that of two-split;the root length and total root hair are greater than conventional irrigation;the influence of different irrigation on the leaf area index is not significant,but the yield of water-saving irrigation and three-split fertilization is greater than conventional treatment,with yield increment of 10~30 kg/mu.Besides,water-saving irrigation can improve water productivity significantly,and save 10%~30% of irrigation water during growing stages.
出处
《中国农村水利水电》
北大核心
2007年第10期34-37,共4页
China Rural Water and Hydropower
基金
浙江省重大科技攻关项目"高效生态农业节水增效综合技术研究与应用"(2005C1207)
关键词
单季水稻
节水灌溉
水肥模式
single-cropping rice
water-saving irrigation
combination of irrigation and fertilization