| 引用本文: | 何铁光,肖润林,石雪晖. 桂西北环境移民示范区柑橘园土壤营养探析[J]. 中国生态农业学报(中英文), 2005, 13(1): 139-142 |
| HE
Tie-Guang,XIAO Run-Lin,SHI Xue-Hui. Analysis on the soft nutrients of citrus orchards in demonstration are8 of environmental immigrants，Northwest Guangxi[J]. Chinese Journal of Eco-Agriculture, 2005, 13(1): 139-142 |
| DOI： | DOI:10.3724/SP.J.1011.year_id].0139 |
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| 摘要: 对桂西北环境移民示范区柑橘园土壤营养状况测定结果表明，该区柑橘园有机质含量丰富，全N、全P偏低，水解氮、有效磷基本适宜，K素缺乏，pH偏酸性；且主要土壤养分变异系数均>16％，土壤pH变异系数为4.4％；不同产量级柑橘园土壤养分差异主要表现于水解氮和速效钾含量，丰产园水解氮和速效钾含量分别为106.46mg／kg和76.21mg／kg，低产园分别为96.88mg／kg和59.83mg／kg且显著低于丰产园，水解氮和速效钾与柑橘产量分别呈极显著和显著相关。并提出果园土壤水解氮、速效钾丰缺指标。 |
| 关键词: 环境移民示范区 柑橘园 土壤养分 |
| 中图分类号: |
| 基金项目:国家科技攻关重大项目(2001BA606A-8)和中国科学院重点项目(NK十五一D-15)部分研究内容 |
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| Analysis on the soft nutrients of citrus orchards in demonstration are8 of environmental immigrants，Northwest Guangxi |
|
HE
Tie-Guang1, XIAO Run-Lin1, SHI Xue-Hui2
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1.Institute of Subtropical Agriculture and Ecology，Chinese Academy of Sciences，Changsha
410125;2.College of Horticulture and Landscape Architecture，Hunan Agricultural University，Changsha
410128
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| Abstract: S0il nutrients of citrus orchards in demonstration area of environmental immigrants．Northwest Guangxi were tested．The results show that the soil fertility in the area is characterized by abundant organic matter，low total N，total P and total K，optimum hydrolyable N and available P，and strong acidity．The major nutrient variable coefficients in differ-ent citrus orchard soils are over 16％ and pH variable coefficient of the soll is 4.4％．The soil nutrient differences of citrus orchards of different yield grades are mainly shown in the amount of hydrolyable N and available K．The contents of hy-drolyable N and available K are 106.46mg／kg and 76.21mg／kg respectively in high-yield citrus orchards and are 96.88
mg／kg and 59.83mg／kg respectively in low-yield citrus orchards．There is an extremely positive correlation between cit-ILlS yields and hydrolyable N and a positive correlation between citrus yields and available K．Also，the indexes of abundance and shortage of hydrolyable N and available K in soils are put forward in this paper． |
| Keyword: Demonstration area of environmental immigrants,Citrus orchards,Soil nutrient |
