摘要
以新大豆1号、中黄35为材料,通过2006、2007年的田间试验,研究了超高产大豆氮磷钾吸收动态及模型,并比较了年份和品种之间的差异。结果表明:不同生育阶段大豆植株叶片、叶柄、茎秆的N和P2O5含量在年度和品种间的变化趋势没有大的区别,2006年新大豆1号K2O的浓度一直表现出较高的水平;与2006年相比,2007年N、P2O5和K2O的吸收时间明显前移;新大豆1号每生产100kg籽粒2a平均需N素8.28kg,P2O50.78kg,K2O8.25kg,中黄35为N8.13kg,P2O50.58kg,K2O4.38kg。与其它地区的结果相比,N的摄取量相当,P2O5只有三分之一,K2O的摄取量是内地的2倍;新大豆1号对K2O的需求明显比中黄35偏多。N、P2O5的最快积累时间为出苗后第70～84天,其绝对含量的积累可用Logistic曲线方程加以描述。结果证明不同品种、不同生态环境条件和栽培措施影响主要养分特别是P2O5和K2O的摄取。
The purpose of this study is to explore the absorption dynamics and models of N,P2O5 and K2O in high-yielding cultivation of soybean.By comparing the difference of two soybean cultivars between two years field experiments,the results showed that the contents of N and P2O5 did not remarkable changing in leaves,petiole and stem between different development stages in two years studies.Xindadou 1 maintained higher level of K2O concentration in 2006 throughout the development stages.Besides,compared with 2006,the dates of N,P and K absorption moved up obviously in 2007.Xindadou 1 needed to absorb 8.28 kg of N,0.78 kg of P2O5 and 8.25 kg of K2O to produce 100 kg seeds.Likewise,Zhonghuang 35 needed to absorb 8.13 kg of N,0.58 kg of P2O5 and 4.38 kg of K2O to produce 100 kg seeds.Compared with other results,the absorbed quantity of N was equal,however,the absorption of P2O5 was one third and K2O was two times higher.Furthermore,Xindadou 1 absorbed more K2O than Zhonghuang 35 obviously.The fastest N and P2O5 absorption time was 10 to 12 weeks after emergence.The accumulation of N and P2O5 could be described by Logistic curve equation.Preliminary conclusions were drawn as follows：different varieties,ecological conditions and cultivation measures affected the absorbed quantity of nutrients,especially P2O5 and K2O.
出处
《大豆科学》
CAS
CSCD
北大核心
2010年第3期413-419,共7页
Soybean Science
基金
国家"十一五"科技支撑计划资助项目(2006BAD21B01-1X)
公益性行业(农业)科研专项经费资助项目(nyhyzx07-004-07-01)
关键词
大豆
氮、磷、钾
吸收
分配
模式
Soybean
N
P2O5
K2O
Absorption
Partition
Models
