播期对直播稻产量的影响

为探索独山县直播稻适宜的播期，开展了4个不同播期的比较试验。结果表明：播种期在4月5日、4月15日，水稻穗实粒数、结实率高于在4月25日、5月5日播种，其单产较高，分别为773．8kg／667m2、760．1kg／667m2，并显著高于在4月25日、5月5日播种。在大田生产中，独山县最佳播种期为4月上旬末至4月中旬。

Effects of Seeding Time on Yield of Direct Seeded Rice

In order to explore the appropriate seeding time on direct seeded rice in Dushan,4 different seeding time on rice was stud-ied. The results showed that the setting grain number per spike and setting grain rate on 5th Apr and 15th Apr was greater than that see-ded on 25th Apr and 5th May,the yield of which was 773. 8kg/667m2,760. 1kg/667m2,respectively. Which is significantly greater than that seeded on 25th Apr and 5th May. So from first to second third of April was proposed on rice production in Dushan.