中粳CY-6覆膜旱作栽培适宜密度的探讨

Studies on Suitable Density of Rice Variety——Zhonggeng CY 6 Covered with Plastics under Dry Cultivation

通过不同栽插密度试验研究 ,探讨中粳CY 6覆膜旱作的适宜密度。结果表明 ,栽插密度为 16 .36万～ 2 0万穴 /hm2 时 ,植株节间配置合理 ,后期功能叶面积大 ,群体增长快 ,成穗足 ,中后期干物质积累高 ,产量结构协调。产量与密度呈抛物线关系 ,密度为 2 0 .36万穴 /hm2 时 ,理论最高产量为 7817.3kg/hm2 。综合分析 ,中粳CY 6覆膜旱作最适宜密度为 2 0万穴 /hm2 。

Suitable density in Zhonggeng CY 6 were studied under dry cultivation covered with plastics. Main results were as follows: When density was 16.36～20 thousand hiils per hm 2, configuration of internode was rational, function leaf area was large, populaiton increased quickly, ears were enough, accumulation of dry matter was high, structure of yield was unisonous. The relation between density and yield took on parabola-shaped curve, academic yield was 7817.3 kg/hm 2 when density was 20.36 thousand hills per hm 2.With synthetical analysis, most suitable density in Zhonggeng CY 6 under dry cultivation covered with plastics.