不同水肥模式单季水稻生长特性研

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，每亩增产10~30kg。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%。

The Growth Characteristics of Single-Cropping Rice in Different Combinations of Irrigation and Fertilization

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.