【摘要】 以水稻鄂粳403为材料,设置3个播期[S1(5月25日)、S2(6月4日)、S3(6月14日)]和4种密度[D1(45 kg/hm2)、D2(60 kg/hm2)、D3(75 kg/hm2)、D4(90 kg/hm2)],研究麦后直播模式下,其对产量及农艺性状的影响。结果表明,播期对鄂粳403全生育期影响较大,随着播期推迟,全生育期缩短;直播密度对基本苗、最高苗及有效穗影响较大,存在极显著差异,播期对株高、成穗率、产量影响较大,存在极显著差异;早播应适当减少播种量,迟播应加大播种量,以便协同提高直播稻鄂粳403产量。更多还原

【Abstract】 To investigate the effects of different sowing date and planting density on yield and agronomic characters of direct-seedingrice after wheat harvest,japonica variety E-Jing 403 was grown in field experiment with 3 sowing dates S1(05-25),S2(06-04),S3(06-14)and 4 densities D1(45 kg/hm2),D2(60 kg/hm2),D3(75 kg/hm2)and D4(90 kg/hm2). The results showed that the sowingdate has a great influence on the whole growing period of E-Jing 403. With the postponing of sowing date,the whole growing period isshortened. Direct seeding density had extremely significant effects on basic seedlings,highest seedlings and effective ears,while sow-ing date had extremely significant effects on plant height,percentage of available tiller and yield. In order to improve the yield of di-rect seeding rice E-jing 403,the seeding rate should be reduced in early sowing and increased in late sowing.更多还原