头季稻收割前施促芽肥对再生稻出苗及产量的影响试验

为充分利用一季中稻地区的光温资源,提高复种指数,增产增收,以超级稻中浙优1号为材料,进行了头季稻收割前不同时期施用促芽肥对再生稻出苗及产量的影响试验。结果表明,在头季稻收割前8～12 d施促芽肥（尿素,225 kg/ha）对再生稻出苗及产量有一定的促进作用,以收割前12 d施用促芽肥出苗最快,生育期长（69 d）,有效穗数300.9万穗/ha、每穗总粒数84.13粒、每穗实粒数71.83粒、结实率85.38%和产量5208.89 kg/ha等性状均最高,可在一季中稻区推广应用。

Foliar spray of fertilizer on rice plant crop before harvest and its effect on shoot emergence and yield of ratoon rice

In order to make full use of temperature and light resources in middle rice growing area,and to improve multiple crop index,production and income of farmers,the fertilizer was foliarly sprayed on rice variety Zhongzheyou 1,at different periods before harvest.The results showed that foliar spray of fertilizer on plant crop 8-12 d before harvest accelerated the emergence and enhanced yield of ratoon rice.The rate of germination was the highest when fertilizer was sprayed 12 d before harvest.The spray also resulted in longer growth stage（69 d）,higher effective panicles（300.9×104 panicles/ha）,grain number（84.13 grains per panicle）,filled grain number（71.83 grains per panicle）,seed setting rate（85.38%）,and yield（4043.1 kg/ha）.On the basis of the results,foliar fertilizer spray method may be extended in the middle rice planting areas.