兴义市Y两优6号机直播栽培技术要点及产量表现

The Yield Performance and Main Points of Cultivation Technique at Mechanization Direct Seeding of Y-Liangyou-6 in Xing-yi City

为探索适宜兴义市的水稻直播播期与密度,开展了不同的播种期(4月15和4月21)和不同播种规格(25cm×18cm和25cm×22cm)的研究。结果表明:4月15日播种(25cm×22cm)条件下获得最高的产量为851.46kg/667m^2,播种期提前降低了水稻的最高茎蘖数和有效穗数,播种密度增加会增加水稻的最高茎蘖数和有效穗数,但是变化幅度不大(0.37万~0.86万/667m^2)。播种期提前明显增加了水稻的成穗率(1.06~7.76个百分点)。因此适当的提前播种,合理控制播种密度会增加水稻的产量。

In order to explore the appropriate seeding dates and density of direct seeding rice in Xingyi, different sapcing （25cm × 18cm and 25cm × 22cm） and different direct seeding dates （ In April 15 and 21 ） were studied. The result showed that under the condi- tion of seeding date in April 15 （25 cm × 22cm）, the rice get the highest yield 851.46kg/667m2, the highest tillers and effective pani- cles decreased by advance the date of direct seeding, and the highest tillers and effective panicles increased as the increased of sowing density, the change range is small （0.37 - 0.86 ten thousand/667m2） , and increased spike rate of tiller by advance the date of direct seeding（ 10.6 -7.76% ）. So advance the date of direct seeding in proper and reasonable control in sowing density can increased the yield of rice.