比较了4个施氮水平下免耕抛栽水稻和常耕抛栽水稻的群体质量及产量。结果表明,在127.5~193.0 kg/hm2施氮水平内,结实率随施氮水平的提高而降低,穗数、穗前干物质生产量、穗后干物质生产量、总干物质生产量、茎叶干物质表观输出量和表观输出率、植株高度、单茎重、粒叶比和根系活力随氮肥施用量的增加而增加,产量随施氮水平的提高而增加。1 9 3.0kg/hm2施氮处理的产量显著高于127.5 kg/hm2处理的。常耕抛栽水稻的有效穗数和粒叶比高于免耕抛栽水稻,但免耕水稻的干物质生产量、茎叶干物质表观输出量、茎叶干物质表观输出率、植株高度、单茎重、根系活力和颖花茎流量比常耕水稻的高,免耕抛栽水稻的群体质量略优于常耕抛栽水稻的。免耕抛栽水稻比常耕抛栽水稻增产2.10%,但差异不显著。 The population quality and yield of no-tilled and sown rice and castrated-sown rice were compared under four nitrogen application levels. The results showed that the seed setting rate decreased with the increase of nitrogen application rate in the range of 127.5 ~ 193.0 kg / hm2 nitrogen application rate. The number of spikes, the production of dry matter before panicle, the production of dry matter after panicle, the total dry matter production, Apparent output and apparent output rate of leaf dry matter, plant height, single stem weight, grain-leaf ratio and root activity increased with the application of nitrogen fertilizer, and the yield increased with the increase of nitrogen application rate. The yield of 1 9 3.0 kg / hm 2 N application was significantly higher than that of 127.5 kg / hm 2 treatment. The effective spike number and grain-leaf ratio of castrated rice were higher than that of no-tilled and cast-off rice, but the dry matter production, apparent dry matter output of stems and leaves, apparent dry matter output of stems and leaves, The height, single stem weight, root activity and flowering of spikelets were higher than those of paddy rice, and the population quality of no-tilled-cast-rice was slightly better than that of cast-in-place rice. No-tillage throwing planted rice than normal tillage throwing rice yield 2.10%, but the difference was not significant.