桉-草复合经营模式土壤理化性质动态分析  

Correlation analysis and dynamics of soil property under the agroforestry of Eucalyptus and herbage models

作　　者：韦铄星[1,2,3] 刘晓蔚[1,2,3] 刘雄盛[1,2,3] 张烨[1,2,3] 黄荣林[1,2,3] 刘菲[1,2,3] 蒋燚[1,2,3] 

机构地区：[1]广西林业科学研究院,广西南宁530002 [2]国家林业局中南速生材繁育实验室,广西南宁530002 [3]广西优良用材林资源培育重点实验室,广西南宁530002

出　　处：《中南林业科技大学学报》2016年第3期67-75,共9页Journal of Central South University of Forestry & Technology

基　　金：广西科学研究与技术开发计划项目(主席科技资金2012217-1;桂科攻1299001-1);广西林科院基本科研业务费项目(林科201619);广西优良用材林资源培育重点实验室开放课题(14B021;15-A-02-01)

摘　　要：以桉树间种牧草（象草、山毛豆和柱花草）的6种复合经营模式为处理,以桉树纯林为对照,分别于造林初期、中期和后期,测定分析不同土层桉树人工林间作牧草复合经营模式土壤理化性质主要因子的变化规律,并运用灰色系统理论方法筛选出对土壤理化性质改良效果较优模式。研究结果表明：（1）在相同土层相同时期,土壤容重、总孔隙度、毛管孔隙度、田间持水量、有机质、全量N、P、K和速效N、P、K含量在不同模式间的差异均达到显著水平（P〈0.05）或极显著水平（P〈0.01）。（2）在相同时期,各模式0~20 cm土层的土壤总孔隙度、毛管孔隙度、田间持水量有机质、全N、速效N、速效P和速效K含量均大于20~40 cm土层,土壤容重反之,全P和全K含量的大小在不同土层间差异不显著。（3）随着造林时期的变化,在相同土层各模式的土壤容重、毛管孔隙度和田间持水量逐渐增加,土壤总孔隙度逐渐减小,而土壤养分含量在不同种植模式不同土层的变化趋势各不相同。（4）在0~20 cm土层灰色关联系数排序为：A2（0.9460）〉B2（0.7921）〉A1（0.7404）〉B1（0.6957）〉A3（0.6274）〉B3（0.5620）〉CK（0.5473）,在20~40cm土层为：A2（0.9578）〉A1（0.7 382）〉B2（0.7223）〉B1（0.6624 2）〉A3（0.6019）〉B3（0.5581）〉CK（0.5151）。其中桉树间作牧草的A2模式对改善土壤物理性质,提高土壤养分含量的综合效果最佳。Based on 6 kinds of compound management mode about eucalyptus interplanting herbage（elephant grass, edamame and diversity）, eucalyptus pure forest for comparison were used to analyze variation of soil physical and chemical properties on different soil layer of eucalyptus-grass compound management model, and then we used the method of gray system model to screening a better mode about the improvement effect on soil physical and chemical properties. The results show that：（1） during the period of the same soil layer, soil bulk density, total porosity and capillary porosity, field capacity, organic matter, total N, P, K and available N, P, K content between different modes are reached significant level（P〈0.05） or extremely significant level（P〈0.01）.（2） at the same stage, all the soil total porosity and capillary porosity and field capacity of organic matter, total N, available N, available P and available K content of 0 ~ 20 cm soil layer greater than 20 ~ 40 cm soil layer, soil bulk density on the other hand, the size of the total P and total K content was not significant between different layers.（3） as the change of planting period, soil bulk density, soil capillary porosity, field capacity of all models at the same soil was increasing, soil total porosity decreases, changing trends of the soil nutrient content in the different planting patterns between different soil layer were different.（4） the grey correlation order among 0 ~ 20 cm soil layer was： A2（0.9460） B2（0.7921） A1（0.7404） B1（0.6957） A3（0.62 74） B3（0.5620） CK（0.5473）, he grey correlation order among 20 ~ 40 cm soil layer was： A2（0.9578） A1（0.7382） B2（0.7223） B1（0.66242） A3（0.6019） B3（0.5581） CK（0.5151）.The best model of Eucalyptus intercropping grasses to improve the soil physical properties, increase soil nutrient content of the comprehensive effect is A2.

关 键 词：农林复合 土壤理化性质 灰色关联法 桉树 牧草 

分 类 号：S756.99[农业科学—森林经理学] S158.3[农业科学—林学]