长江中下游甘薯氮磷钾肥施用效果与区域土壤养分丰缺指标研究  

Study on Application Effects of N,P and K Fertilizers on Sweet Potato and Abundance-deficiency Indexes of Regional Soil Nutrients in Middle and Lower Reaches of Yangtze River

作　　者：张辉[1,2] 谭诚 周晓月 马洪波 许仙菊[1,2] 汪吉东 宁运旺[1] 张永春 ZHANG Hui;TAN Cheng;ZHOU Xiaoyue;MA Hongbo;XU Xianju;WANG Jidong;NING Yunwang;ZHANG Yongchun(Institute of Agricultural Resources and Environmental Sciences,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China;School of Environment&Safety Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;School of Horticulture,Hainan University,Haikou 570228,China)

机构地区：[1]江苏省农业科学院农业资源与环境研究所,南京210014 [2]江苏大学环境与安全工程学院,江苏镇江212013 [3]海南大学园艺学院,海口570228

出　　处：《土壤》2022年第4期676-681,共6页Soils

基　　金：国家甘薯产业技术体系项目(CARS-10);江苏省自然科学基金项目(BK20190259);江苏省农业科技自主创新资金项目(CX(21)3002)资助。

摘　　要：根据2009—2014年在长江中下游薯区实施的68个氮、磷、钾肥料用量田间试验结果,建立了基于养分丰缺指标法——肥料效应函数的甘薯氮、磷、钾施肥指标体系。结果表明:施用氮肥、磷肥、钾肥均对甘薯具有极显著的增产效果(P<0.01);植薯土壤水解性氮含量的“高”、“低”指标分别为170 mg/kg和100 mg/kg,有效磷含量的临界指标为17 mg/kg,土壤速效钾含量“高”、“低”的指标分别为110 mg/kg和30 mg/kg;高产田块甘薯的氮、磷、钾肥最佳经济推荐施用量分别为N 125 kg/hm^(2)、P_(2)O_(5)160 kg/hm^(2)和K_(2)O 182 kg/hm^(2),中低产田块的氮、磷、钾肥最佳经济推荐施用量分别为N 155 kg/hm^(2)、P_(2)O_(5)120 kg/hm^(2)和K_(2)O 220 kg/hm^(2)。According to the results of 68 field experiments on N,P and K fertilizer application in the middle and lower reaches of Yangtze River from 2009 to 2014,N,P and K fertilizer application index system was established for sweet potato,which was based on nutrient abundance and deficiency index method and fertilizer effect function.The results show that application of N,P and K fertilizers have significant effects on increasing yield of sweet potato(P<0.01).For potato-growing soil,the“High”and“Low”indexes are 170 mg/kg and 100 mg/kg for available(hydrolytic)nitrogen,110 mg/kg and 30 mg/kg for available potassium,respectively,while the critical index is 17 mg/kg for available phosphorus.The optimal economic recommended rates of nitrogen,phosphorus and potassium are N 125 kg/hm^(2),P_(2)O_(5)160 kg/hm^(2)and K_(2)O 182 kg/hm^(2),respectively,the optimal economic recommended application rates of N,P and K for medium and low yield fields are N 155 kg/hm^(2),P_(2)O_(5) 120 kg/hm^(2)and K_(2)O 220 kg/hm^(2),respectively.

关 键 词：长江中下游 甘薯 速效氮、磷、钾 丰缺指标 推荐施肥 

分 类 号：S531.062[农业科学—作物学]