李忠芳,唐政,李继光,娄翼来,董旭

• 1:贺州学院化学与生物工程学院
• 2:牡丹江师范学院生命科学与技术学院
• 3:中国农业科学院农业环境与可持续发展研究所
• 4:辽宁省土壤肥料总站

摘要(Abstract)：

系统分析了我国辽宁典型褐土区阜新和凌源市2个玉米长期施肥定位试验点的数据资料,研究化肥N、P和有机肥(M)的不同组合(N、NP、M、MN、MNP)及不施肥(CK)各处理下玉米产量变化、产量可持续指数(SYI)及其与土壤有机质的关系。结果显示,M、MN、MNP处理下土壤有机质(SOM)含量比CK、N、NP处理显著增加5.2 g·kg-1~11.1 g·kg-1;各试验点不同施肥下玉米产量差异大,与对照相比,各施肥处理均显著提高玉米产量,其中MNP处理的产量最高(阜新6 757 kg·hm-2、凌源10 467 kg·hm-2),但其与化肥(N、NP)处理间无显著差异;MN和MNP处理的产量可持续性指数(SYI)分别为0.50和0.54,显著高于其他处理(N、NP、M、CK),表明增施有机肥可显著提高作物产量可持续性。施用有机肥下,SOM含量与SYI呈极显著正相关(R2=0.74),表明配合施用有机肥显著提高SOM含量,进而提高玉米产量的可持续性。

关键词(KeyWords)： 长期施肥;产量可持续性;土壤有机碳;土壤肥力

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(41201288;41361068)

作者(Author): 李忠芳,唐政,李继光,娄翼来,董旭

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