行/株距比对早晚稻产量和氮素吸收、利用的影响  

Effects of Ratio of Row Spacing to Intrarow Spacing on Yield and Nitrogen Accumulation and Utilization of Early and Late Rice

作　　者：杨成春[1] 林洪鑫[1] 袁展汽[1] 肖运萍[1] 刘仁根[1] 

机构地区：[1]江西省农业科学院土壤肥料与资源环境研究所,农业部长江中下游作物生理生态与耕作重点实验室,国家红壤改良工程技术研究中心,南昌330200

出　　处：《中国农学通报》2014年第24期118-122,共5页Chinese Agricultural Science Bulletin

基　　金："十二五"国家科技支撑计划"南方平原稻作农区农业面源污染防控技术集成与示范"(2012BAD15B03);江西省农科院青年创新基金"行株距配置对双季稻不同株型品种产量的影响及其机理研究"(2010-CQN004)

摘　　要：为双季水稻的合理配置行/株距比(RS/IS)提供理论依据。以早稻‘淦鑫203’、‘中嘉早17’和晚稻‘淦鑫688’、‘五丰优T025’为材料,在31.20万蔸/hm2密度下,研究了行/株距比对早晚稻产量和氮素吸收、利用的影响。早稻品种的产量以RS/IS2.8(30.0 cm×10.7 cm)和RS/IS2.0(25.0 cm×12.8 cm)处理较高,以RS/IS5.0(40.0 cm×8.0 cm)和RS/IS1.3(20.0 cm×16.0 cm)处理较低,而晚稻品种以RS/IS5.0和RS/IS2.0处理较高,以RS/IS2.8和RS/IS1.3处理较低。早稻氮素积累总量和氮肥表观利用率以RS/IS2.0处理较高,以RS/IS5.0处理较低,100 kg籽粒需氮量以RS/IS1.3处理较高,以RS/IS2.0处理较低;而晚稻氮素积累总量、100 kg籽粒需氮量和氮肥表观利用率以RS/IS2.8处理较高,以RS/IS5.0处理较低。可见,在该试验条件下,早晚稻4个品种采用25.0 cm×12.8 cm种植方式时的产量较高,采用20.0 cm×16.0 cm种植方式较低,氮素积累总量、100 kg籽粒需氮量和氮肥表观利用率以40.0cm×8.0cm较低。The aim of the study was to provide a theoretical basis for the configuration of ratio of row spacing tointrarow spacing（RS/IS）. With early rice‘Zhongjiazao 17＇and‘Ganxin 203＇and late rice‘Ganxin 688＇and‘WufengyouT025＇as materials, the effects of RS/IS（Ratio of row spacing to intrarow row spacing） on yield,nitrogen accumulation and utilization were studied in the same planting density of 31.20×104hills/hm2. Theresults showed that yield of early rice were higher in RS/IS2.8（30.0 cm ×10.7 cm）, RS/IS2.0（25.0 cm × 12.8 cm）treatment and lower in RS/IS5.0（40.0 cm × 8.0 cm）, RS/IS1.3（20.0 cm × 16.0 cm） treatment, while for late ricewas higher in RS/IS5.0, RS/IS2.0 treatment and lower in RS/IS2.8, RS/IS1.3 treatment. For early rice, the totalnitrogen accumulation and apparent utilization ratio of nitrogen were higher in RS/IS2.0 treatment and lower inRS/IS5.0 treatment, while for late rice, that were higher in RS/IS2.8 treatment and lower in RS/IS5.0 treatment. Forearly rice, nitrogen requirement for 100 kg grain production was higher in RS/IS1.3 treatment and lower inRS/IS2.0 treatment, while for late rice that was higher in RS/IS2.8 treatment, lower inRS/IS5.0 treatment. It was obvious that 4 varieties of early and late rice obtained higher yield in 25.0cm × 12.8 cm and lower yield in20.0 cm × 16.0 cm, and treatment 40.0 cm×8.0 cm had lower total nitrogen accumulation, nitrogen requirementfor 100 kggrainproduction and apparent utilization ratio of nitrogen.

关 键 词：水稻 行 株距比 产量 氮素积累 

分 类 号：S511.4[农业科学—作物学]