直播早稻覆膜旱作施肥量及密度试验

Experiments on applied fertilizer amount and planting density of direct seeded early rice by tectorial dry farming

1997年以舟 90 3为材料 ,进行了直播早稻覆膜旱作不同施肥量及密度试验 ,结果表明 :覆膜旱作具有明显的增温作用 ,从而能提早出苗和缩短全生育期 ;节肥效果明显 ,直播早稻覆膜旱作可比常规水作法节省氮肥 50 % ,且产量相当 ,施用常规水作法 70 %的氮肥 ,则有显著的增产效果。其适宜密度为 2 0× 2 0 (cm)。

Experiments of different amount of applied fertilizerand planting density in the direct seeded early rice by tectorial dry farming showed that tectorial dry farming had a obvious effect on decrease of the fertilizer requirement.Tectorial dry planted rice achieved the similar yield when applied half nitrogenous fertilizer of traditional planting,remarkedly increased the yield when applied 70% of notrogenous fertilizer.The better planting density was 20×20 (cm).