旱作栽培技术对水稻的影响  

Effect of dry cultivation technique on rice

作　　者：谭友斌[1] 叶永印 Ibrahim 

机构地区：[1]南充市嘉陵区农业局,四川南充637005 [2]贵州省毕节地区农科所,贵州毕节551700 [3]尼日利亚卡登纳州Lamda农场

出　　处：《西南农业学报》2008年第2期309-312,共4页Southwest China Journal of Agricultural Sciences

基　　金：联合国粮农组织资助项目(South South cooporation Tfng 250004070)

摘　　要：用三因素二次回归旋转设计对水稻旱种的施氮量、基肥施氮比例及播种密度进行研究。结果表明:产量与施氮量呈正相关、与基肥施氮比例和播种密度呈二次抛物线关系。播种密度一定和施氮水平较低时,氮肥应先满足中、后期群体之需要而作穗肥施用,基肥施氮比例不应超过50%;而在施氮水平较高时,氮肥施用应以基肥深施为主,基肥施氮比例应占总施氮量的72·5%右左,其余视苗情作穗肥施用较佳。选择生育期较短、高抗病、优质、高产的品种是水稻旱种成攻的关键;选用适当的除草剂并进行有效除草是水稻旱种成攻的保证。The application amount of nirtrogen, the propotion of the nitrogen in base fertilizer and the sowing density of rlce dry planting were studied by rotational design of the quadratic regression with three experimental factors. The results showed that the yield was positive correlated with the application amount of nitrogen and the yield had a secend-degree parabola relation with the propotion of the nitrogen in base fertilizer and the sowing density. When the sowing density was invariant and the application amount of nitrogen was low, the nitrogen fertilizer should be ear-fertilizer for meeting the requirement of the middle and later groups and the propotion of the nitrogen in base fertilizershould be less 50 %. When the application amount of nitrogen was high ,the nitrogen fertilizer should give provity to suhseil application. The proportion of the nitrogen in base fertilizer should about eccupy 72.5 % of the total application amount of nitrogen. The residual one should be applied as ear-fertilizer, The key of success in rice dry planting was the selection of the varieties with short growing periods, good quality and high yidd. In addition ,the selection of the apposite herbicide and effective weed control were quarantee of success in rice dry planting.

关 键 词：二次回归旋转设计 播种密度 穗肥 生育期 

分 类 号：S511.048[农业科学—作物学]