不同新型增效尿素对甜玉米产量及氮素利用率的影响

Abstract

在粤北以甜玉米品种广甜2号为试验材料，研究不同新型增效尿素对甜玉米产量与氮素利用率的影响。结果表明：施用腐植酸尿素的甜玉米产量最高，显著高于普通尿素处理，提高了7.78% (p < 0.05)；控失尿素、聚能网尿素和腐植酸尿素的蛋白质和氨基酸含量均显著高于普通尿素处理；控释尿素、聚能网尿素、腐植酸尿素和含锌尿素处理的氮素累积量和氮素利用率均显著大于普通尿素处理，氮素利用率从17.19%提高到22.79%~24.56%；各处理中产值和净收益最高的是腐殖酸尿素处理，其次为聚能网尿素处理，其中腐殖酸尿素处理净收益比普通尿素处理提高14.5%。综合来看，施用腐植酸尿素和聚能网尿素有利于增加甜玉米产量和氮素积累，改善籽粒品质，提高氮素利用率和增加净收益。 A field experiment was conducted to determine the effects of different kinds of novel synergistic urea on yields and nitrogen use efficiency of sweet corn variety (Guangtian 2) in North Guangdong province of China. The results showed that corn yields in the treatment of humic acid urea were the highest, increased significantly (7.78%, p < 0.05) compared with that of common urea treatment. The protein and amino acid content of corn kernel under humic acid urea, Ju-Neng-Wang urea and controlled release urea treatments were significantly higher than that of common urea treatment. The humic acid urea, controlled release urea, Ju-Neng-Wang urea and zinc urea treatments could help the crop to increase nitrogen accumulation amount significantly compared with common urea treatment, and the N use efficiency was improved from 17.19% to 22.79%-24.56%. The humic acid urea treatment got the highest output and net income, followed by Ju-Neng-Wang urea, and the net income of humic acid urea treatment increased by 14.5% than common urea treatment. Taken together, application of humic acid urea and Ju-Neng-Wang urea could significantly enhance the yield and accumulation of N for sweet corn, improve the quality of sweet corn, and increase N use efficiency and net income.