金沙江干热河谷银合欢人工林对土壤养分的影响

干旱区研究 ›› 2011, Vol. 28 ›› Issue (2): 229-234.

金沙江干热河谷银合欢人工林对土壤养分的影响

方海东¹, 魏雅丽², 刘刚才², 杨艳鲜¹, 潘志贤¹, 纪中华¹

1. 云南省农业科学院热区生态农业研究所, 云南元谋 651300;
2. 中国科学院成都山地灾害与环境研究所, 四川成都 610041

收稿日期:2010-05-21 修回日期:2010-09-26 出版日期:2011-04-25 发布日期:2011-09-06
作者简介:方海东(1979-),男,黑龙江海伦人,硕士,助理研究员,现从事生态恢复研究工作.E-mail: rqsfhd@163.com
基金资助:
国家"十二五"科技支撑计划(2010BAE00739);云南省自然科学基金(2007C235M)

Effects of Soil Nutrients on Planted Leucaena leucocephala Forest in the Dry-hot Jinshajiang River Valley

FANG Hai-dong¹, WEI Ya-li², LIU Gang-cai², YANG Yan-xian¹, PAN Zhi-xian¹, JI Zhong-hua¹

1. Institute of Tropical Eco-agriculture, Yunnan Academy of Agricultural Sciences, Yuanmou 651300, Yunnan Province, China;
2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chcngdu 610041, China

Received:2010-05-21 Revised:2010-09-26 Published:2011-04-25 Online:2011-09-06

摘要/Abstract

摘要： 通过干热河谷银合欢人工林对土壤改良效应5年的研究,结果表明:银合欢林具有很好的土壤改良效应,土壤有机质明显高于CK,在0~20cm,20~40cm和40~60cm的土层中,比CK分别高52.61%,51.09%和43.52%,土壤有机质随着土壤深度的增加而减少。pH在0~20cm,20~40cm和40~60cm的土层中,比CK分别低8.28%,2.41%和2.19%。全N含量上层土壤明显高于下层,水解N比CK高43.75%,随着土壤深度的增加,水解N呈现下降趋势,并具有显著性相关关系。全P含量比CK高0.05mg/kg,相差不是很明显。有效P含量与CK相差不是很明显,在不同土层深度有效P含量的变化非常一致。全K含量比CK高0.98mg/kg,银合欢的生长对土壤全K含量的影响并不明显。速效K含量平均为136.79mg/kg,变化幅度较大,比CK高69.45mg/kg,银合欢的生长对土壤速效K含量的影响明显。

关键词: 银合欢, 人工林, 土壤养分, 干热河谷, 金沙江

Abstract: The soil improvement effect on the planted Leucaena leucocephala forest in the dry-hot Jinshajiang River Valley was researched for five years. The results show that the soil improvement effect on the forest was obvious. Soil organic matter content was obviously higher than CK, its values at soil depths of 0-20 cm, 20-40 cm and 40-60 cm under the forest were 52.61%, 51.09% and 43.52% higher than CK respectively, and it decreased with the increase of soil depth. At soil depths of 0-20 cm, 20-40 cm and 40-60 cm, the pH values of forest soil were 8.28%, 2.41% and 2.19% lower than CK respectively. Total soil N content was 43.75% higher than CK, it decreased with the increase of soil depth, and there was a significant correlation between total soil N content and soil depth. Total soil P content was 0.05 mg/kg higher than CK only. The difference of available P content between the forest soil and CK was not obvious. Total soil K content was 0.98 mg/kg higher than CK, and the effect of total K content on the forest was not obvious. The available K content in the forest soil was 136.79 mg/kg, and it was 69.45 mg/kg higher than CK.

Key words: Leucaena leucocephala, planted forest, soil nutrient, dry-hot valley, Jinshajiang River

中图分类号:

S153.6

方海东, 魏雅丽, 刘刚才, 杨艳鲜, 潘志贤, 纪中华. 金沙江干热河谷银合欢人工林对土壤养分的影响[J]. 干旱区研究, 2011, 28(2): 229-234.

FANG Hai-dong, WEI Ya-li, LIU Gang-cai, YANG Yan-xian, PAN Zhi-xian, JI Zhong-hua. Effects of Soil Nutrients on Planted Leucaena leucocephala Forest in the Dry-hot Jinshajiang River Valley[J]. , 2011, 28(2): 229-234.

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