摘要
采用田间试验法,研究不同腐植酸含量的腐植酸复混肥对玉米生物性状、产量、经济效益、氮素利用率及土壤肥力的影响。结果表明,随着腐植酸含量的增加,玉米穗长、穗围、百粒质量均有不同程度增长;产量、产投比较CK和NPK处理呈增长趋势;腐植酸与无机复混肥配施还可显著增加玉米根、茎秆和籽粒中的氮含量,促进根和茎秆中的氮向籽粒中转移,氮素利用率较NPK处理提高11.93～23.37百分点;腐植酸在改良土壤方面具有重要意义。综合考虑玉米产量和氮素利用率,复混肥中含有20%～25%的腐植酸为玉米的最佳肥料。
This field experiment was conducted to study the influence of humic acid application rate on maize yield,economic benefit,and nitrogen use efficiency as well as efficiency of soil fertility.The results showed that： the maize ear length,ear diameter,barren tip length,hundred kernel weight had various remarkable changes with the increase of humic acid fertilization.The yield and input-output ratio were significantly increased in three humic acid compound fertilizer treatments compared with CK and NPK treatment.In addition,the HA＋NPK treatments ameliorated physical properties of soil and promoted the transfer of nitrogen from root and stem to the grain,and the nitrogen use efficiency was increased by 11.93%～23.37% in three humic acid compound fertilizer treatments than those of NPK treatments.To achieve high corn yield and high nitrogen use efficiency,the optimal HA rate in humic acid compound fertilizer should be controlled between 20% to 25%.
出处
《山西农业科学》
2012年第8期853-856,共4页
Journal of Shanxi Agricultural Sciences
基金
山西省自然科学基金项目(2012011009-3)
山西师范大学校级重点项目(ZK1101)
关键词
腐植酸复混肥
玉米产量
氮素利用率
土壤改良
humic acid compound fertilizer； corn yield； nitrogen use efficiency； soil amelioration
