我国籽实和饲草大麦土壤有效磷丰缺指标和推荐施磷量

The abundance-deficiency index of soil P and recommended phosphorus fertilizer application rates for grain and forage barley in China

为了给我国大麦测土施磷提供科学依据,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”,开展了我国大麦土壤有效磷丰缺指标和推荐施磷量研究.结果表明,我国大麦土壤有效磷第1~8级丰缺指标依次为≥40.7、24.2~40.7、14.4~24.2、8.6~14.4、5.1~8.6、3.0~5.1、1.8~3.0和<1.8 mg/kg.当磷肥利用率15%~35%时,目标产量3~7.5 t/hm~2籽实大麦第1~8级土壤推荐施磷量分别为0、9~50、17~100、26~150、34~200、43~250、51~300和60~350 kg/hm~2;目标产量6~15 t/hm~2干草大麦第1~8级土壤推荐施磷量依次为0、9~50、17~100、26~150、34~200、43~250、51~300和60~350 kg/hm~2;目标产量15~45 t/hm~2青贮大麦第1~8级土壤推荐施磷量分别为0、7~51、15~102、22~153、29~204、36~255、44~306和51~357 kg/hm~2.本研究建立了我国籽实和饲草大麦土壤有效磷丰缺指标推荐施肥系统,为我国大麦测土施磷奠定了科学基础.

To provide scientific basis for soil testing and P fertilizer recommendation of barley,an algorithm for scattered experimental data integration and the new applied formula based on “the methods of nutrient balance and projected yield minus soil fertility yield” were employed to study the abundance-deficiency index(ADI) of soil P and the recommended phosphorus fertilizer application rate(RPFAR) for barley in China.The results showed that the ADI of soil available phosphorus(Olsen-P) for barley in China from the first to the eighth level were ≥40.7,24.2~40.7,14.4~24.2,8.6~14.4,5.1~8.6,3.0~5.1,1.8~3.0 and<1.8 mg/kg,respectively.When the phosphorus fertilizer use efficiency in current season(PFUEICS) was 15%~35% and the target yield of grain barley was 3~7.5 t/hm~2,the ranges of the RPFAR for the abundance-deficiency level 1~8 from high to low were 0,9~50,17~100,26~150,34~200,43~250,51~300 and 60~350 kg/hm~2,respectively.When the PFUEICS was 15%~35% and the target yield of barley hay was 6~15 t/hm~2,the ranges of the RPFAR for the abundance-deficiency level 1~8 from high to low were 0,9~50,17~100,26~150,34~200,43~250,51~300 and 60~350 kg/hm~2,respectively.When the PFUEICS was 15%~35% and the target yield of barley silage was 15~45 t/hm~2,the ranges of the RPFAR for the abundance-deficiency level 1~8 from high to low were 0,7~51,15~102,22~153,29~204,36~255,44~306 and 51~357 kg/hm~2,respectively.In this study,the recommended fertilization system of soil available phosphorus for grain and forage barley in China was established,and it laid a scientific foundation for soil testing and phosphorus fertilization of barley in China.