摘要
为了给中国农牧交错带燕麦施肥提供科学依据,采用土壤有效养分含量与缺素处理相对产量回归方程法、土壤有效养分丰缺分级改良方案和"养分平衡-地力差减法"确定适宜施肥量新应用公式,开展了中国农牧交错带燕麦土壤氮素丰缺指标与适宜施氮量研究。结果表明,中国农牧交错带燕麦土壤碱解氮第2~7级丰缺指标依次为≥248,161~248,105~161,69~105,45~69,<45 mg/kg;土壤全氮第2~8级丰缺指标依次为≥2.9,2.0~2.9,1.4~2.0,1.0~1.4,1.0~0.7,0.5~0.7,<0.5 g/kg。当目标产量1.5~6.0 t/hm^2时,土壤氮素丰缺级别第1~8级的适宜施氮量范围依次为0,11~45,23~90,34~135,45~180,56~225,68~270,89~315 kg/hm^2。
To provide a scientific basis for oats fertilizing in the farming-grazing transitional zone（FGTC） of China,the abundance-deficiency index（ADI） of soil N and the appropriate nitrogen application rates（ANAR） of different N abundance-deficiency level soil for oats in the FGTC of China.The method of regression equation between soil available nutrient content and relative yield of the treatment with complete nutrients except one,the improved scheme for the grading of soil available nutrients abundance-deficiency,and the new applied formula based on ＂nutrient balance and projected yield minus soil fertility yield＂ for determining the appropriate fertilizer application rates were employed.The results showed that the ADI of soil alkaline hydrolysis nitrogen for oats in the FGTC of China for the second to seventh level were≥248,161-250,105-161,69-105,45-69 and 45 mg/kg,respectively.The ADI of soil total nitrogen for oats in the FGTC of China for the second to eighth level were ≥2.9、2.0 -2.9、1.4 -2.0、1.0 -1.4、1.0-0.7、0.5-0.7 和 0.5 g/kg,respectively.When the nitrogen fertilizer use efficiency in current season is 40%,and the projected yield of oats is1.5-6.0 t/hm^2,the ranges of ANAR for the first to eighth level soil are 0-0,11-45,23-90,34-135,45-180,56-225,68-270 and 89-315 kg/hm^2,respectively.
出处
《北方农业学报》
2017年第5期22-27,共6页
Journal of Northern Agriculture
基金
国家现代农业产业技术体系建设项目(CARS-35)
关键词
中国
农牧交错带
燕麦
测土施肥
碱解氮
全氮
有机质
丰缺指标
氮肥
施肥量
China
Farming -grazing transitional zone
Oats
Soil testing and fertilizer recommendation
Alkaline hydrolysis nitrogen
Total nitrogen
Organic matter
Nutrient abundance-deficiency index
Nitrogen fertilizer
Fertilizer application rate
