| 引用本文： |
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谭宏伟,周柳强,谢如林,黄美福.广西甘蔗种植区土壤钾素肥力分级研究[J].广西科学,2003,10(4):321-324. [点击复制]
- Tan Hongwei,Zhou Liuqiang,Xie Rulin,Huang Meifu.A Classification System for Potassium Availability in Soils for Sugarcane Planting Regions in Guangxi[J].Guangxi Sciences,2003,10(4):321-324. [点击复制]
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| 摘要: |
| 统计分析1991年至2001年在广西来宾、合浦、贵港、博白等县的红壤、赤红壤和砖红壤上进行的82个施钾肥增产效应田间试验资料,分砂土、壤土、粘土质地对广西甘蔗种植区土壤钾素肥力进行分级。结果表明,甘蔗种植区土壤速效钾肥的临界值为:砂土46.2mg/kg,壤土51.4mg/kg,粘土60mg/kg。砂土、壤土和粘土土壤速效钾肥分级指标分别为:低< 46mg/kg、< 52mg/kg和< 60mg/kg,中46~90mg/kg、52~110mg/kg和60~120mg/kg,高> 90mg/kg、> 110mg/kg和> 120mg/kg. |
| 关键词: 土壤 速效钾含量 肥力分级 甘蔗种植区 |
| DOI： |
| 投稿时间：2002-09-17修订日期：2003-09-27 |
| 基金项目: |
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| A Classification System for Potassium Availability in Soils for Sugarcane Planting Regions in Guangxi |
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Tan Hongwei, Zhou Liuqiang, Xie Rulin, Huang Meifu
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| (Institute of Soil and Fertilizer, Guangxi Agricultural Academy of Scienes, Daxuelu, Nanning, Guangxi, 530007, China) |
| Abstract: |
| From 1991 to 2001,82 field experiments were carried out on sugarcane in Laibin,Hepu,Guigang and Bobai Crop response to K as affected by the K status (available K) was measured and statistically analysed.Calculated critical values depended on the soil texture,characterised by sands,loam soils and clays.For sugar cane cultivated on all three soil textures,the calculated critical K values were,46.2,51.2 and 60 mg/kg of available K in sandy,loamy and clayey soils,respectively. Accordingly,potassium supply classes for soils of cultivating sugar cane were established. For the three soil textures,the following supply classes were defined:(1) Low K supply:< 46 mg/kg,< 52 mg/kg and < 60 mg/kg,(2) Medium K supply:46~90 mg/kg, 52~110 mg/kg and 60~120 mg/kg,(3) High K supply:> 90 mg/kg, > 110 mg/kg and > 120 mg/kg,for sandy,loamy and clayey soils,respectively. |
| Key words: soils soil available potassium content classification sugarcane planting regions |
