关键词: 生物质炭基肥, 生物质炭基肥, 水稻产量, 氮素利用率, 茎蘖成穗率, 生物炭

Abstract: In order to study adaptability of different rice direct seeding models in Chengdu basin and determine optimal models, the effects of seedling emergence, growth and development, water use and yield formation for different direct seeding methods were studied with hybrid rice Chuanyou6203 and conventional rice Jinnongsimiao in Chengdu basin. The rice direct seeding methods included dry direct seeding with plowing, dry direct seeding with no-till and water direct seeding with plowing. The result indicated that: the difference of yield among different direct seeding methods mainly depended on numbers of productive tillers. With better seedling emergence and more panicles, the yield potential of dry direct seeding with plowing was highest than other methods. Although seedling emergence and yield of water direct seeding with plowing were lower than that of dry direct seeding with plowing, this treatment was beneficial for decreasing weeds, paddydropped seedlings and water consumption after seeding in field. With more weeds and paddy- dropped seedlings, poor seedling emergence and huge water consumption after seeding, the yield of dry direct seeding with no-till was the lowest. With plowing, dry direct seeding and water direct seeding have both advantages. But for practical production, water direct seeding was the best.