栽培措施对直播水稻寒优湘晴N素吸收、稻米品质及产量的影响  

EFFECTS OF CULTURAL PRACTICES ON NITROGEN ABSORPTION,QUALITY AND YIELD OF DIRECT SEEDING RICE HANYOUXIANGQING

作　　者：彭斌[1] 王国忠[2] 陆峥嵘[2] 王余龙[3] 

机构地区：[1]盐城工学院,盐城224000 [2]上海市农业技术推广服务中心,上海201103 [3]扬州大学农学院,扬州225009

出　　处：《上海农业学报》2003年第3期20-23,共4页Acta Agriculturae Shanghai

基　　金：2001年度上海市科技兴农重点攻关项目"优质稻米高产保优栽培技术研究与示范"(农科攻字[2001年第6-5号])研究内容之一。

摘　　要：以寒优湘晴为材料,研究了密度、肥料措施对稻株氮素吸收、米质及稻谷产量的影响。结果表明:(1)稻株拔节前各阶段吸N量随密度增加而提高,拔节后各阶段的吸N量和总吸N量随密度增加而降低;提高后期施N比例会降低拔节前各阶段吸N量,提高拔节后各阶段吸N量和总吸N量。(2)稻米的加工品质、外观品质和粗蛋白含量随密度增加而降低;提高后期施N比例可提高稻米加工品质和粗蛋白含量,但会降低外观品质。(3)抽穗期单茎吸N量、拔节至抽穗吸N量与单位面积颖花量相关密切;抽穗期植株含N率与抽穗期单茎吸N量相关密切。The effects of planting densities and practices of applying nitrogen fertilizer on nitrogen absorption, quality and yield of direct seeding rice Hanyouxiangqing were studied. The results were as follows: (1) increasing planting density enhanced the amount of nitrogen absorbed by the rice before elongation but decreased the absorbed amount after elongation and the total absorbed amount during growth and development period; increasing the ratio of nitrogen applied at later stage decreased the absorbed amount of nitrogen before elongation but enhanced the absorbed amount after elongation and the total. (2)the apparent quality, milling quality and crude protein content of the rice decreased with planting density increasing; increasing the ratio of nitrogen applied at later stage could enhance the milling quality and the crude protein content but decreased the apparent quality. (3)the amount of nitrogen absorbed by single stem at heading stage and the amount of nitrogen absorbed during elongation-heading were closely related to the spikelets per unit area, and also there was an obvious correlation between the nitrogen content in plant at heading stage and the amount of nitrogen absorbed by single stem at heading stage.

关 键 词：栽培技术 直播水稻 “寒优湘晴” N素吸收 稻米 品质 产量 影响因素 

分 类 号：S511[农业科学—作物学]