不同水稻拌种剂对宁夏引黄灌区直播稻生长及产量的影响

Study on Growth and Yield of Direct Seeding Rice with Different Combination of Seed Dressing in Ningxia Yellow River Irrigation Region

为验证不同拌种剂对直播水稻生长及产量的影响,以指导直播稻安全生产,促进其增收,以宁粳31为参试品种,特设置了本试验。结果表明,参试拌种剂均有提高直播稻抗逆性、增加分蘖、降低空秕率、提高产量的效果。与对照相比,吡虫啉·咪鲜胺FS拌种能使直播水稻保苗率、分蘖数、有效穗数、叶面积、干物质量分别提高6.10%、21.01%、11.11%、24.75%和20.73%,使空秕率降低45.74%,同时使水稻产量提高3.92%,差异达显著水平。1.3%吡虫啉·咪鲜胺FS有较好的促进水稻生长、提高抗逆性、减轻病虫害、增加产量的作用,且其用药成本比其他4种参试药剂低,对水稻生长安全,是今后推广使用的方向。

A field experiment was carried out to study the growth and yield of direct seeding rice with different combination of seed dressing,using Ningeng 31 as materials. The results showed that all of the tested preparations would increase the stress resistance, enhance the effective panicle rate of tillers, decrease the sterile grain rate, and increase the grain yield. Compared with the control, the existing rate of seedling, tiller number, effective panicles, leaf area, dry weight and grain yield of 1.3% imidacloprid-prochloraz FS treatment increased by 6.10%, 21.01%, 11.11%, 24.75%, 20.73% and 3.92%, respectively, the sterile grain rate decreased by 45.74%, 1.3% imidacloprid-prochloraz （FS） could promote the growth, enhance the stress resistance, increase the grain yield of rice and reduce the diseases and insect pests. Compared with the other treatments, its controlling cost was low.