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
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S531.062

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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)和江苏省农业科技自主创新资金项目(CX(21)3002)资助。


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
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    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/hm2、P2O5160 kg/hm2和K2O 182 kg/hm2,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/hm2、P2O5120 kg/hm2和K2O 220 kg/hm2

    Abstract:

    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/kgand 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 N125 kg/hm2, P2O5160 kg/hm2 and K2O182 kg/hm2, respectively, the optimal economic recommended application rates of N, P and K for medium and low yield fields are N155 kg/hm2, P2O5120 kg/hm2 and K2O220kg/hm2, respectively.

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张辉,谭诚,周晓月,马洪波,许仙菊,汪吉东,宁运旺,张永春.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[J].土壤,2022,54(4):676-681. ZHANG Hui, TAN Cheng, ZHOU Xiaoyue, MA Hongbo, XU Xianju, WANG Jidong, NING Yunwang, ZHANG Yongchun. 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[J]. Soils,2022,54(4):676-681

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  • 收稿日期:2021-12-09
  • 最后修改日期:2022-02-26
  • 录用日期:2022-03-09
  • 在线发布日期: 2022-08-25
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