追氮时期对旱稻产量性状的影响

以旱稻65为材料研究了不同的追施氮肥时期对旱稻单位穗数、千粒重、干物质转移率等方面的影响。结果表明：旱稻干物质生产与分配不同于水稻品种，其亩穗数、穗粒数、千粒重与追施氮肥时间密切相关。拔节期追施氮肥更能保证成穗率与提高结实数，而且与灌浆最大速率，灌浆最大速率出现的时间密切相关。旱稻品种在拔节期追施氮肥较为适宜。

The Effects of the Different Stage of Nitrogen Fertilizer Application on the Yield Characteristics of the Upland Rice

The experiment studied the effects of the different stage of nitrogen fertilizer application on the upland rice such as the spike number of per 667m2、the weight of 1000 grains、the dry matter transference rate and so on with upland rice 65.The results indicated that the dry matter production and distribution of the upland rice were different from rice variety,its spike number of per 667m2、kernel number of per spike and weight of 1000 grains had close relation to the stage of nitrogen fertilizer application. The nitrogen fertilizer application at jointing stage more ensured the rate of turning into ears and improved the number of filled grains and also had close relation to the highest milky rate as well as the appearance time of the highest milky rate.Therefore,it was more appropriate that the upland rice variety was provided with the nitrogen fertilizers at jointing stage.