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Position: Home > Articles > Study on N,P and K Optimal Uses for Processed-potato in Zhangye City Soils 2011,43 (4) 570-575

张掖市加工型马铃薯氮磷钾最佳施用量的研究

作  者:
秦嘉海;李宏斌
单  位:
张掖市农业技术推广站;河西学院农学系
关键词:
加工型马铃薯;氮磷钾;经济效益;最佳施用量
摘  要:
经回归统计分析,张掖市加工型马铃薯N素经济效益最佳施用量为0.100 t/hm2,N素最佳施用量时的理论产量为42.89 t/hm2。P素经济效益最佳施用量为0.076 t/hm2,P素最佳施用量时的理论产量为40.98 t/hm2。K素经济效益最佳施用量为0.198 t/hm2,K素最佳施用量时的理论产量为43.58 t/hm2。经增产效应和经济效益分析,加工型马铃薯产量随N、P、K素用量增加而增加,但边际产量、边际产值、边际利润、肥料贡献率则随N、P、K用量增加而递减,此趋势符合报酬递减律。
译  名:
Study on N,P and K Optimal Uses for Processed-potato in Zhangye City
作  者:
QIN Jia-hai1,LI Hong-bin2(1 Hexi Institute of Agronomy,Zhangye,Gansu 734000,China; 2 Agricultural Technology Extension Station of Zhangye City,Zhangye,Gansu 734000,China)
关键词:
Processed-potatoes,Nitrogen-phosphorus-potassium,Economic benefits,Optimal fertilizer use
摘  要:
The regression analysis showed that the optimal economic benefits of the processed-potato in Zhangye city could be obtained under the uses of 0.100 t/hm2 of nitrogen,0.076 t/hm2 of phosphorus and 0.198 t/hm2 of potassium,respectively,with the corresponsive theoretic yields of 42.89 t/hm2,40.98 t/hm2 and 43.58 t/hm2,respectively.With the increase of nitrogen,phosphorus and potassium fertilizers,the yield of processed-potato increased but the marginal yield,product value and profit,fertilizer contribution rate decreased,which were accord with the law of diminishing returns.

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