作 者：
周碧青;陈成榕;张黎明;杨文浩;毛艳玲;邢世和
单 位：
School;福建农林大学资源与环境学院
关键词：
亚热带;龙眼园;枇杷园;土壤可溶性有机氮;季节动态;影响因素
摘 要：
为探讨亚热带不同类型果园土壤可溶性有机氮(SON)季节动态差异及其影响因素,在福建南亚热带地形、母质、土壤类型和种植年限均相同的两种类型相邻果园(龙眼园和枇杷园)设立定时定位采样小区,采用TOC-TN分析、离子自动分析和气相色谱分析等技术,分析了果园不同季节和土层深度的土壤SON含量及相关属性,借助灰色关联分析探讨果园土壤SON动态变化的主要影响因素。研究结果表明,龙眼园上层(0~20 cm)和下层(20~40 cm)土壤SON平均含量分别占土壤总可溶性氮(TSN)的68.8%和71.1%,枇杷园上层(0~20 cm)和下层(20~40 cm)土壤SON平均含量分别占TSN的63.7%和70.2%;不同季节龙眼园上下层土壤SON含量均显著高于枇杷园,表明果园土壤可溶性氮主要成分是SON,且不同类型果园土壤SON含量差异明显。两种果园土壤夏、冬季SON含量均显著高于春、秋季,但龙眼园上下层土壤SON含量均以冬季最高,枇杷园则以夏季最高;果园土壤SON含量与其可能影响因素的关联度系数大小顺序为有机质含量、细菌和真菌生物量>蛋白酶活性、温度和pH值>天门冬酰胺酶活性和含水量,表明亚热带果园土壤SON季节动态主要受土壤有机质含量、细菌和真菌生物量差异的影响,同时还受不同季节土壤蛋白酶活性、温度和pH值等差异的影响。
译 名：
Seasonal dynamics and impact factors of soil soluble organic nitrogen in different subtropical fruit plantations
作 者：
ZHOU Bi-qing;CHEN Cheng-rong;ZHANG Li-ming;YANG Wen-hao;MAO Yan-ling;XING Shi-he;College of Resource and Environment, Fujian Agriculture and Forestry University;University Key Lab of Soil Ecosystem Health and Regulation in Fujian, Fujian Agriculture and Forestry University;School of Environment, Griffith University;
关键词：
subtropics;;longan plantation;;loquat plantation;;soil soluble organic nitrogen;;seasonal dynamics;;impact factor
摘 要：
To discuss the seasonal dynamics and its impact factors of soil soluble organic nitrogen(SON)in different subtropical fruit plantations, the plots sampling at fixing time and position were set in two adjacent different fruit plantations(Dimocarpus Longan Lour. and Eriobotrya Japonica Lindl.)with the same topography, parent material, soil type and planting time in south subtropics of Fujian. The concentrations of soil SON and relative properties at different seasons and depths of both fruit plantations were analyzed by TOC-TN analyzer,Quickchen Automateic Ion Analyzer and Gas Chromatography and the main impact factors of soil SON dynamics in the fruit plantation were discussed by grey correlation analysis. The results showed that the mean contents of soil SON accounted for 68.8% and 71.1% of total solu-ble nitrogen(TSN)in upper(0~20 cm)and lower(20~40 cm)layers of Dimocarpus Longan Lour. plantation, and 63.7% and 70.2% of TSN in upper(0~20 cm)and lower(20~40 cm)layers of Eriobotrya Japonica Lindl. plantation, respectively, and the SON contents in Dimocarpus Longan Lour. plantation at different seasons and depths were significantly higher than those in Eriobotrya Japonica Lindl. plantation,which indicated that SON was main component of soil soluble nitrogen in the fruit plantations and was significantly different between various types of fruit plantation in subtropics. Soil SON contents in Summer and Winter were significantly higher than those in Spring and Autumn in both fruit plantations, while the SON contents in upper and lower layers of Dimocarpus Longan Lour. plantation were highest in Winter,and those in both layers of Eriobotrya Japonica Lindl. plantation were highest in Summer. The grey correlation coefficients between SON content and possible impact factor in the fruit plantations showed following order:organic matter content, bacteria and fungi biomass >protease activity,soil temperature and pH>Asparaginase activity and soil moisture. The results indicated that the seasonal dynamics of soil SON in the subtropical fruit plantations were mainly affected not only by the differences of organic matter content, bacteria and fungi biomass, but also by the differences of protease activity, soil temperature and pH in different seasons.
