我国籽实和饲草燕麦土壤有效磷丰缺指标与推荐施磷量初步研究

Preliminary Study on Abundance-deficiency Index of Soil Available P and Recommended Phosphorus Fertilizer Application Rates for Oats in China

为了给我国燕麦测土施磷提供科学依据,本研究采用“零散实验数据整合法”和“养分平衡-地力差减法新应用公式”,开展了我国燕麦土壤有效磷丰缺指标与推荐施磷量研究。结果表明,我国燕麦土壤有效磷第1~8级丰缺指标依次为≥45、24~45、12~24、6.2~12、3.2~6.2、1.7~3.2、0.9~1.7和<0.9mg/kg。当磷肥当季利用率为15%~35%时,目标产量1.5~6.0t/hm^(2)籽实燕麦第1~8级土壤推荐施磷量分别为0、4~40、9~80、13~120、17~160、21~200、26~240和30~280kg/hm^(2);目标产量4.5~15t/hm^(2)饲草燕麦第1~8级土壤推荐施磷量依次为0、6~50、13~100、19~150、26~200、32~250、39~300和45~350kg/hm^(2)。本研究建立了我国籽实和饲草燕麦土壤有效磷丰缺指标推荐施肥系统,为我国燕麦测土施磷奠定了科学基础。

To provide a scientific basis for soil testing and P fertilizer recommendation of oats,an integration method for scattered experimental data and the new applied formula based on“the method of nutrient balance and projected yield minus soil fertility yield”were employed to study the abundance-deficiency index(ADI)of soil available P and the recommended phosphorus fertilizer application rate(RPFAR)for oats in China.The results show that the ADI of soil available P for oats in China from the first to the eighth level are≥45,24~45,12~24,6.2~12,3.2~6.2,1.7~3.2,0.9~1.7 and<0.9mg/kg,respectively.When the phosphorus fertilizer use efficiency in current season(PFUEICS)is 15%~35%and the target yields of grain oats are 1.5~6.0 t/hm^(2),the ranges of RPFAR for the first to the eighth level soil are 0,4~40,9~80,13~120,17~160,21~200,26~240 and 30~280 kg/hm^(2),respectively.When the PFUEICS is 15%~35%and the target yield of forage oats is 4.5~15 t/hm^(2),the ranges of the RPFAR for the first to the eighth level soil are 0,6~50,13~100,19~150,26~200,32~250,39~300 and 45~350 kg/hm^(2),respectively.In this study,the recommended fertilization system based on the ADI of soil available P for grain and forage oats in China is preliminary established,and it lays a scientific foundation for soil testing and phosphorus fertilization of oats in China.