| 湘南丘陵区红壤旱地红薯钾肥最佳用量与产量关系 |
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| 引用本文： | 刘淑军,黄平娜,黄铁平,谢卫国,秦道珠.湘南丘陵区红壤旱地红薯钾肥最佳用量与产量关系[J].中国农学通报,2010,26(6):178-181. |
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| 作者姓名： | 刘淑军 黄平娜 黄铁平 谢卫国 秦道珠 |
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| 作者单位： | 1. 中国农业科学院农业资源与农业区划研究所,北京100081;祁阳农田生态国家野外实验站,湖南祁阳,426182
2. 湖南省土壤肥料工作站,长沙,421001 |
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| 基金项目： | 湖南省测土配方施肥项目、国家红壤农业生态站项目资助 |
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| 摘 要： | 为了寻求红薯的最佳钾肥施用量,提高钾肥利用率,笔者在湘南红壤丘陵区,设置钾肥5水平肥料效应田间试验,并采用田间试验和室内分析相结合的研究方法,分别测产,测定红薯养分含量以及土壤速效养分。试验结果表明:在钾肥施用量为225kg/hm2时,红薯的经济效益最高,每公顷的纯收入为9624.5元,增收率为47.7%,红薯的经济产量也较高,为19501.5kg/hm2,每公顷增产52.9%。同时,在该施肥水平下,整株红薯的氮、磷、钾养分吸收总量和钾肥利用率均最高,钾肥利用率达到15.6%。相反,在钾肥施用量为225kg/hm2时,0~20cm耕层土壤的速效养分含量和其他钾肥用量的处理相比较,均降低。综合考虑,在五个施钾水平中,笔者得出湘南丘陵区红薯钾肥的最佳施用量为225kg/hm2。
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| 关 键 词： | 森林资源 森林资源 资产化管理 森林资产 |
| 收稿时间： | 2009-11-09 |
| 修稿时间： | 2009-11-25 |
Relationship between the Best Application of Potassium Fertilizer on Sweet Potato and Yield on Red Soil Hilly Dry Land in Southern Hunan |
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| Liu Shujun,Huang Pingna,Huang Tieping,Xie Weiguo,Qin Daozhu.Relationship between the Best Application of Potassium Fertilizer on Sweet Potato and Yield on Red Soil Hilly Dry Land in Southern Hunan[J].Chinese Agricultural Science Bulletin,2010,26(6):178-181. |
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| Authors: | Liu Shujun Huang Pingna Huang Tieping Xie Weiguo Qin Daozhu |
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| Institution: | Liu Shujun1,2,Huang Pingna1,Huang Tieping3,Xie Weiguo3,Qin Daozhu1,2 (1Chinese Academy of Agricultural Sciences Institute of Agricultural Resources , Regional Planning,Beijing 100081,2National Observation , Research Station of Farml, Ecosystem in Qiyang,Qiyang Hunan 426182,3Soil , Fertilizer Station,Department of Agriculture of Hunan Province,Changsha 421001) |
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| Abstract: | In order to find the best application of potassium fertilizer on sweet potato, and improve potassium fertilizer use efficiency, the article set up the field experiment on red soil hilly region of southern Hunan, applying potassium fertilizer for five levels. And they measured yield, nutrient content of sweet potato, and soil available nutrient, by combining field experiment with laboratory analysis. The results indicated that, when the potassium application on sweet potato was 225 kg/hm2, the economic benef... |
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| Keywords: | red soil hilly regions sweet potato the best application of potassium fertilizer sweet potato yield |
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