华南农业大学学报2018，Vol.39Issue(1)：93-99,7.
加勒比松林分改造对土壤化学性质和酶活性的影响
Impacts of stand transformation on soil chemical properties and enzyme activities in a Pinus caribaea stand
摘要
Abstract
[Objective]Stand transformation was studied in a Pinus caribaea stand by introducing broad-leaved tree species to provide a scientific basis for rational management of P. caribaea stands.[Method]Castanopsis fissa,Acacia mangium,Artocarpus nitidus ssp.Lingnanensis and Camellia oleifera were planted among rows and lines of one part of theP. caribaea stand (P1),Schima superba,Symplocos lancifolia,Carallia brachiata and C. oleifera were planted among rows and lines of another part of the P. caribaea stand (P2), and one part of the remaining theP. caribaea stand was used as the control (CK). Five-point sampling method was used to collect soil samples from 0-20 and 20-40 cm depth soil layers respectively at three sample plots. Soil pH, organic matter, total nitrogen, total phosphorus, total potassium, alkalized nitrogen, avaiable phosphorus and avaiable potassium were determined by routine methods. Activities of catalase, phosphatase and urease were determined by colorimetry, disodium phenyl phosphate colorimetric method and titration with potassium permanganate, respectively.[Result]The contents of soil organic matter, total nitrogen, alkalized nitrogen and available phosphorus in 0-20 and 20-40 cm depth soil layers of three sample plots decreased in the order of P2, P1 and CK. The soil nutrient contents in 0-20 cm depth soil layers of the three sample plot was significantly higher than those in corresponding 20-40 cm depth soil layers. The total phosphorus contents were low in 0-20 cm depth soil layer of three sample plots, and the content of soil total potassium decreased in the order of CK, P1 and P2. Soil catalase activity was significantly related to pH and the contents of organic matter, total nitrogen, alkalized nitrogen, total potassium and alkalized phosphorus. Phosphatase activity was significantly related to pH and the contents of organic matter, total nitrogen, alkalized nitrogen, available phosphorus and total potassium. Urease activity was significantly related to soil contents of organic matter, total nitrogen, total phosphorus, alkalized nitrogen, avaiable phosphorus and avaiable potassium.[Conclusion]Stand trans for mation significantly improved the soil fertility of P. caribaea stand. The effect of mixed pattern at P2 plot was better than those at P1 plot . Mixed pattern at P2 plot can be used in stand transformation.关键词
加勒比松林/阔叶树/林分改造/土壤化学性质/酶活性Key words
Pinus caribaea/broad-leaved tree/stand transformation/soil chemical property/enzyme activity分类
农业科技引用本文复制引用
方怡然,李洁,薛立..加勒比松林分改造对土壤化学性质和酶活性的影响[J].华南农业大学学报,2018,39(1):93-99,7.基金项目
广东省林业厅资助项目 "林分改造优良乡土阔叶树种筛选" (粤财农2015-159号) （粤财农2015-159号）
