【摘要】 在小麦超高产攻关试验田内,研究了亩产9405 kg·hm(~2)的冬小麦对氮、磷、钾养分的吸收、分配与运转规律,结果表明:植株氮、磷、钾养分含量在整个生育期内呈双峰曲线,第一个峰值三种养分均出现在分蘖初期,第二峰值氮磷出现在起身期,钾则出现在拔节期;植株对三种养分的吸收速率呈多峰曲线型变化,其养分吸收的最大速率期,氮、钾出现在返青-孕穗末期,磷出现在返青-扬花期;小麦每生产100kg籽粒需氮(N)、磷(P)、钾(K)的数量分别为3.65、0.46和3.86kg。更多还原

【Abstract】 In the trial field for super-high-yielding wheat, the laws of the absorption, distribution and translocation of N, P and K for the winter wheat with grain yield of 9405kg·hm-2 were studied. The result showed that, in the growth period of wheat, the contents ofN, P and K in wheat plant all appeared in the form of double-peak curves, and the first peak ofN and P existed in the mid-tillering stage of before over-wintering stage, the second in the standing stage, while that of K occurred in the jointing stages. The absorption rates of the three nutrients by wheat presented as multi-peak curves in the growth period. And the maximum rates of Nand P absorption appeared in the period from turning-green to booting, while that of P in the period from turning-green to flowering. About 3. 65 kg of N, 0. 46 kg of P and 3. 86 kg of K wereneeded to produce each 100 kg of wheat grain.更多还原