广东甜玉米施肥指标体系研究

在广东省甜玉米主产区系统开展“3414”试验的基础上,深入分析了甜玉米相对产量与施肥量之间的回归关系,并建立了三元二次回归方程：Y=591.48＋ 14.03N-0.26P＋9.06K-0.37N2＋8.49P2-0.19K2-0.06NP-0.04NK＋0.05PK （R2=0.92）.对该回归方程进行显著性检验,得出P＜0.05,表明甜玉米施肥量与产量之间存在较为显著的回归关系.同时还详细探讨了肥料增产效应和经济收益之间的关系,结果表明氮、钾肥的收益在一定范围内与施肥量成正比,磷肥施用量过高会出现负收益现象.最后在综合单、双因素分析结果的基础上,初步建立了广东地区甜玉米施肥指标体系,提出广...

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Published in广东农业科学 Vol. 40; no. 20; pp. 67 - 70
Main Author 张白鸽 李强 陈琼贤 罗少波 曹健 钟玉娟 杨秋
Format Journal Article
LanguageChinese
Published 广东省农科院蔬菜研究所,广东广州,510640%佛山市农业科学研究所,广东佛山,528145 2013
Subjects
养分丰缺指标
广东
施肥指标体系
甜玉米
甜玉米
养分丰缺指标
施肥指标体系
广东
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ISSN1004-874X

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Summary:在广东省甜玉米主产区系统开展“3414”试验的基础上,深入分析了甜玉米相对产量与施肥量之间的回归关系,并建立了三元二次回归方程：Y=591.48＋ 14.03N-0.26P＋9.06K-0.37N2＋8.49P2-0.19K2-0.06NP-0.04NK＋0.05PK （R2=0.92）.对该回归方程进行显著性检验,得出P＜0.05,表明甜玉米施肥量与产量之间存在较为显著的回归关系.同时还详细探讨了肥料增产效应和经济收益之间的关系,结果表明氮、钾肥的收益在一定范围内与施肥量成正比,磷肥施用量过高会出现负收益现象.最后在综合单、双因素分析结果的基础上,初步建立了广东地区甜玉米施肥指标体系,提出广东地区甜玉米每667 m2理论产量900 kg的氮、磷、钾肥最佳施肥量分别为24、8、20 kg.
Bibliography:44-1267/S
Based on systemic ＇3414＇ experiment conducted in the major production areas of Guangdong provience, the regression relationship between yield of sweet maize and fertilizer amount was analyzed, and the regression equation was described as Y=591.48＋ 14.03N-0.26P＋9.06K-0.37N2＋8.49P2-0.19K2-0.06NP -0.04NK＋O.O5PK （R2=0.92）. The significance test of the equation indicated P〈 0.05, impling a remarkable relationship between the yield and fertilizer rate. Besides, the effect of increasing yield as well as economic benefit by fertilizer was evaluated in this study, and the results revealed that the profit from N, K fertilizers were proportional to fertilizer amount, however, negative yield occurred when too much P fertilizer was applied. Finally, combied with sigle and double indicators analysis, the fertilization index for sweet maize of Guangdong was preliminarily formulated, and the optimal N,P,K fertilizer amounts for sweet maize in Guangdong were 24, 8 and 20 kg respectively for the theoretical yield of 9
ISSN:1004-874X