集约经营下南方竹园土壤酸化特征与缓冲容量研究  

Soil Acidification and Buffering Capacity of Bamboo Plantation Soils under Intensive Cultivation Management

作　　者：吴士文 索炎炎 梁钢 郑增亭 徐祖祥[2] 卢升高 

机构地区：[1]江大学环境与资源学院,310058 [2]杭州市植保土肥总站,浙江杭州310020

出　　处：《土壤通报》2012年第5期1120-1125,共6页Chinese Journal of Soil Science

基　　金：杭州市农业科技攻关项目(20101032B04)资助

摘　　要：高强度集约经营下竹周土壤质量退化是制约竹笋持续丰产高效的主要障碍因素。通过研究集约经骨雷竹林典型土壤剖面的酸度特征、养分变化以及土壤酸碱缓冲容量，以期探明集约经营下雷竹林衰退的可能因素。结果表明，雷竹种植后，表层土壤呈现明显的酸化现象，表土的最低pHH20值达到了3．75；表土的有机质和速效磷含量明显提高，表上（0～20cm）速效磷含量最高可达350mgkg-1；竹林土壤铝的形态分析表明，有机配合态铝在表土中的含量较高，并随剖面深度的降低而降低；土壤交换态铝含量与pHH20和pHKCl呈极显著负相关，有机配合态铝含量与有机质和速效磷含量呈极显著m相关；竹园土壤的酸碱缓冲容量在8．58～14．31mmol kg-1，之间，有机质含量是影响竹园土壤缓冲容量的主要因素。The degradation of soil quality may result in a low production of the bamboo under intensive management. In this paper, acidity features, nutrients changes and pH buffer capacity in the bamboo plantation soil profile were investigated to determine the possible soil factors inducing the bamboo withering. The results showed that topsoil acidification occurred after bamboo plantation. The pHH20 and pHkc1 values in the topsoils were obviously lower than those of lower soil layers. The lowest pHH20 in the bamboo plantation soils was as low as of 3.75. The bamboo plantation soils were characterized by higher soil organic matter and available phosphorus content. The highest available phosphorus in topsoil was as high as 350 mg kg-1. According to the analysis of aluminum chemical species, organic complexed aluminum was higher in the topsoil, decreasing from the surface layer to lower soil layer. Content of exchangeable aluminum was significantly negative correlation with primo and prim, and the increase of exchangeable aluminum may increase the harm to bamboo roots. Content of organic complexed aluminum was positive correlation with organic matter. Acid-alkaline titration technique was applicable in determination of pH buffer capacity on bamboo plantation soils. According to the slope-derived pH buffer capacity, they ranged between 8.58 and 14.31mmol kg-1. Statistics analysis suggested that soil organic matter was the main factor affecting the pH buffer capacity of bamboo plantation soils.

关 键 词：竹园 土壤酸化 pHH2O pHKCl 铝形态 酸碱缓冲能力 

分 类 号：S153[农业科学—土壤学]