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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (6): 178-181.

所属专题： 马铃薯； 园艺

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

湘南丘陵区红壤旱地红薯钾肥最佳用量与产量关系

刘淑军1,2,黄平娜1,2,黄铁平3,谢卫国3,秦道珠1,2   

  • 收稿日期:2009-11-09 修回日期:2009-11-25 出版日期:2010-03-20 发布日期:2010-03-20

Relationship between the best application of potassium fertilizers on sweet potato and yield on red soil hilly dry land in southern Hunan

  • Received:2009-11-09 Revised:2009-11-25 Online:2010-03-20 Published:2010-03-20

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摘要：

在湘南红壤丘陵区，采用田间试验和室内分析相结合的研究方法，设置“单因素5水平”钾肥肥料效应田间试验，分别测产，测定红薯养分含量以及土壤速效养分，以寻求红薯的最佳钾肥施用量。试验结果表明：施用钾肥能明显提高红薯经济产量和施肥经济效益，同时，钾肥还能提高薯块和藤叶的氮、磷、钾养分吸收总量，并显著提高了土壤的速效钾含量，在中低钾肥用量下，增加了土壤碱解氮和速效磷的含量。在四个施钾水平中，综合考虑，本文得出红薯钾肥的最佳施用量为225 kg/hm2，增产幅度达到52.9%，每公顷增收幅度达到47.7%。

关键词: 森林资源, 森林资源, 资产化管理, 森林资产

Abstract:

We set up the fertilizer effect trial of "single-factors, five level" on red soil hilly region of southern Hunan. In order to find the best application of potassium fertilizers on sweet potato, we measured yield, nutrient content of sweet potato, and soil available nutrients, by combining field trials with laboratory analysis. The results indicated that potassium fertilizers could improve the sweet potato economic output, and fertilizer cost obviously. Meanwhile, the application of potassium fertilizers also improved the total amount absorption of Nitrogen， Phosphorus， and Potassium of potato tubers, cane leaves, and improved soil available potassium content significantly. Under the middle and low application amount of potassium, the soil available nitrogen and available phosphorus content was increased. By comprehensive consideration, in the four application of potassium fertilizers, the best application on sweet potato was 225 kg/hm2, the yield rate were 52.9 percent, the income per ha reached 47.7 percent.