Abstract:

The effects of wide-narrow row planting and same row planting on plant height, tiller number, yield and main economic characters of direct seeding rice were studied in this paper, using Fuyuan 4 and Dongdao 4 as materials. The results showed, wide-narrow row planting could increase the plant height, tiller number, earing percentage, dry matter accumulation, and significantly increase the yield of direct seeding rice. Compared to the same row planting, the effective panicle number, total grain number, seed setting rate and yield of Fuyuan 4 and Dongdao 4 using wide-narrow row planting were increased by 18.5% and 4.3%, 18.08% and 1.8%, 0.26% and 0.47%, 7.78% and 3.00%, respectively. All of these results indicated that the yield of direct seeding rice in Ningxia Yellow River irrigation region would increase greatly under wide-narrow row planting.

Key words: Yellow River irrigation region, direct seeding rice, wide-narrow row, yield

摘要：

以富源4号和东稻4号为试验材料，研究了宽窄行种植和普通行距种植对直播稻株高、分蘖、产量及主要经济性状等的影响。结果表明，宽窄行种植能增加直播稻株高和分蘖，提高成穗率，增加干物质积累量，并显著提高产量；与等行距种植相比，采用宽窄行种植，富源4号和东稻4号的有效穗数分别高18.5%和4.3%，总粒数分别高18.08%和1.8%，结实率分别高0.26%和0.47%，产量分别增加7.78%和3.00%。说明宁夏引黄灌区直播稻采用宽窄行种植有利于获得高产。

关键词: 引黄灌区, 直播稻, 宽窄行, 产量