寒地水稻钵体毯式育秧播种密度试验总结

摘要

通过比较200～260粒/100 cm^27个播种密度下38 d秧龄的钵体毯状秧苗素质和移栽后缺穴率,结果表明：①播量越稀,秧苗素质越高,然而播量在200～240粒/100 cm^2的秧苗素质差异不大,播量高于240粒/100 cm^2,秧苗素质明显下滑;②播量从200粒/100 cm^2增加到260粒/100 cm^2,秧苗的缺穴率呈现先降低后增加的趋势。播量在210～250粒/100 cm^2,缺穴率变化较小。播量在220～230粒/100 cm^2,移栽的缺穴率最低。兼顾秧苗素质和缺穴率两方面考虑,寒地水稻钵体毯式育秧播量应该在220～230粒/100 cm^2比较适宜。%Seedling quality and the rate of missing holes of pot-mat seedling were reaearched under the condition of 7 different planting densities which from 200 grains/100 cm^2 to 260 grains/100 cm^2 and seedling age of 38 d, the result indicated： 1.lower sowing rate can achieve better seedlings quality, but the seeding quantity which from 200 grains/100 cm^2 to 240 grains/100 cm^2 were not significantly different, seedling quality began to decline significantly when the seeding quantity higher than 240 grains/ 100 cm^2, 2. the rate of missing holes is firstly increased and then decreased when the seeding quantity from 200 grains/100 cm^2 to 260 grains/100 cm^2, from 210 grains/100 cm^2 to 250 grains/100 cm^2, it had fewer changes on rate of missing holes. The lowest rate of missing holes can be achieved when the seeding quantity from 220 grains/100 cm^2 to 230 grains/100 cm^2. the optimize seeding quantity were 220-230 grains/100 cm^2 which balance the Seedling quality and the rate of missing holes.