摘要： 采用田间试验的方法,分析了吉林省公主岭市及乾安县高产春玉米氮、磷、钾吸收、分配及转运规律的异同。结果表明:公主岭地区吐丝后的吸氮量占总吸氮量的26.1%、乾安为28.0%;磷素方面分别为20.5%,25.8%,而钾在吐丝期前吸收量占最大吸钾量为84.2%,92.3%。养分在各器官内的分配转运特点体现在:氮、磷均随生长中心转移而发生变化,而钾的变化不明显。地区之间的差异体现在公主岭地区的氮、磷累积量显著高于乾安地区,而钾的累积量差异不明显。造成差异的原因是公主岭地区土壤养分含量较高,积温较高、降水偏多以及生育期较长。同一地区不同品种间比较发现,先玉335的氮、磷、钾累积量总体上均高于郑单958。

关键词: 春玉米, 氮, 磷, 钾

Abstract: A field experiment was conducted to analysis the absorption,distribution and translocation of nitrogen(N),phosphorus(P) and potassium(K) of spring maize in Gongzhuling and Qian′an of Jilin Province.The results were shown as follows,N and P uptake after silking in Gongzhuling were 26.1%,20.5% of total uptake respectively,which were 28.0%,25.8% in Qianan.K uptake before silking in Gongzhuling and Qianlan were 84.2%,92.3% of maximum K uptake respectively.Trends of N and P accumulation coincided with the transfer of growth center,while K not.The maximum accumulation of N,P and K in Gongzhuling was higher than that in Qianan,while the accumulation of K in Gongzhuling was a little lower than that in Qianlan at maturity stage.Regional difference was related to better soil nutrients,higher accumulated temperature,more rainfall and longer growth period in Gongzhuling.Xianyu335 shows a higher accumulation of N,P and K than Zhengdan958 in both regions.

Key words: Spring maize, N, P, K

中图分类号: 

• S513． 06

• S143