江汉平原小麦夏季繁殖研究

Study on Summer-sown Technoligy Wheat of Jianghan Plain

1999～ 2 0 0 1年连续 3年小麦夏季繁殖试验表明 ,地处江汉平原的荆州城西郊 ,8月初至11月中旬的气候生态条件基本能满足半冬性偏春性小麦的生育需要。各分期播种的试验用种未经春化处理 ,大田播种后能很快出苗 ,顺利抽穗并基本成熟 ,全生育期 92～ 10 2d ,表现出“二短二长”的生育进展 ,植株较矮、穗长变短、穗粒数偏低、千粒重下降。同时 ,灌浆期叶绿素含量明显低于正季播种的小麦。在江汉平原 ,一般 8月上旬为小麦夏繁的最佳播种期。

The successive three-year wheat su mmer sowing test from 1999～2001 reveals that the climatic and ecological condition from August to the beginning of November in the west suburb, Jingzhou city in chinese Jianghan plain meets the meets of wheat soming. The habit of wheat sowing is spring variety. The seeds examined for sowing in different stages were not vernalized. After sowing in the field, it could emerge quickly, ear smoothly and mature. The complete breeding season was around 92～103 days, which reflected the breeding character of “two short, two long”. In the test, the wheat has the following characters: it grew fast and the plant was relatively short, the panide length became shorter and the nunber of panicles were relatively small, its thousand-grain weight were quite light, the chlorophyll content in miking period was considerably less than the wheat sown in the normal season. The sowing test in different stages prores that the beginning of August in chinese Jianghan planin it the best sowing season for wheat summer breeding.