%0 Journal Article
%T EFFECT OF SUPER SPARSE CULTIVATION ON HEAD MILLED RICE PERCENTAGE AND CHALKINESS IN HYBRID RICE VARIETIES IN THE EASTERN AND SOUTHERN DISTRICTS OF SICHUAN PROVINCE<br>川东南杂交中稻超稀栽培对稻米整精米率和垩白粒率的影响
%A XU Fu-Xian
%A ZHENG Jia-Kui
%A ZHU Yong-Chuan
%A WANG Gui-Xiong
%A Yang Da-Jin
%A LIU Kang
%A <br>徐富贤
%A 郑家奎
%A 朱永川
%A 王贵雄
%A 杨大金
%A 刘康
%J 植物生态学报
%D 2004
%I Editorial Office of Chinese Journal of Plant Ecology
%X 以'II优7号'、'汕优63'和'香优2号'为材料,研究了超稀栽培与稻米整精米率和垩白粒率的关系及其作用原因,结果表明:栽秧密度与整精米率呈极显著负相关,与垩白粒率呈极显著正相关.在中高氮施肥水平条件下,当栽秧密度超稀到7.51万穴*hm-2时,在保证比传统高产栽培密度每公顷栽秧21.64万穴的对照不减产前提下,整精米率提高了15.69%～29.92%,垩白粒率降低了16.34%～21.22%.其原因在于,超稀植增加了每穗着粒数,降低了齐穗期的叶粒比,以致稻穗籽粒灌浆速率减慢而改善整精米率和垩白粒率.齐穗后20 d施氮可同时起到提高结实率和整精米率的双重效果.
%K Hybrid mid-season rice
%K Super sparse cultivation
%K Percentage of head milled rice
%K Percentage of chalky rice<br>杂交中稻
%K 超稀植
%K 整精米率
%K 垩白粒率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=2F2173CCFF292BF447DC2681EA33BBAE&aid=0B5DA5C588BD1AB4&yid=D0E58B75BFD8E51C&vid=D3E34374A0D77D7F&iid=94C357A881DFC066&sid=710C005323C0774A&eid=09F7C8D609E885AE&journal_id=1005-264X&journal_name=植物生态学报&referenced_num=11&reference_num=12