摘要
１９９７ 年在浙江省东阳市进行了氮营养对杂交水稻５１８ 植株氮的浓度，吸收和生长影响的试验，叶片、茎和根的氮含量在有效分蘖至分蘖盛期最高，此后，逐渐下降直至成熟。叶片和茎是贮存库的最大贡献者。在稻穗中来源于叶片、茎和根的氮分别占３０ ％ ～３５ ％ ，１７ ％ ～３８ ％ 和６ ％ ～２０ ％ 。稻穗中的氮占总氮量的５８ ％ ～６０ ％ 。稻株对氮的吸收一直延续到成熟，在分蘖盛期、抽穗期和灌浆期氮的吸收率分别为１ ．３３ ～８ ．１７ ，１ ．５２ ～６ ．０３ 和０ ．０５ ～１ ．０２ ｋｇ·ｈｍ － ２·ｄ － １ ．
A field experiment was carried out in 1997 in Dongyang County of Zhejiang Province to evaluate the effect of N application on N concentration,N uptake and growth of hybrid rice 518.Nitrogen concentration in the leaves,culms and roots were the highest during active tillering and mid tillering stages.N concentration in those organs declined thereafter until maturity.The leaves and culms were major contributors to the remobilization pool.Nitrogen in panicle accounted for 30%-35%,17%-38% and 6%-20% from leaves,culms and roots,respectively.The panicle accounted for 58%-60% of total N in rice plant.In general,N absorption continued until maturity.N uptake rates of 1.33-8.17,1.52-6.03 and 0.05-1.02 kg·hm -2 ·d -1 were observed at mid tillering,heading and at dough stage,respectively.
出处
《浙江农业学报》
CSCD
1999年第4期174-177,共4页
Acta Agriculturae Zhejiangensis
基金
蒙农业部高新技术重点项目
浙江省自然科学基金
关键词
氮浓度
吸收
固定
转移
杂交水稻
N concentration
uptake
remobilization
translocation
hybrid rice
