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| 生草对渭北黄土高原苹果园土壤呼吸的影响 | |
| 引用本文： | 贾曼莉,郭宏,杜毅飞,王海涛,李会科,曹卫东.生草对渭北黄土高原苹果园土壤呼吸的影响[J].草地学报,2014,22(3):518-527. |
| 作者姓名： | 贾曼莉 郭宏 杜毅飞 王海涛 李会科 曹卫东 |
| 作者单位： | 1. 西北农林科技大学资源环境学院, 陕西 杨陵 712100; 2. 农业部西北植物与肥料及农业环境重点实验室, 陕西 杨陵 712100; 3. 中国农业科学院农业资源与农业区划研究所, 北京 100081 |
| 基金项目： | 公益性行业(农业)科研专项(201103005-9);“十二五”科技支撑计划(2014BAD16B06)(2014BAD16B02);国家现代农业产业技术体系(CARS-28);陕西省科技统筹创新工程计划(2011KTZB02-02-05);西北农林科技大学推广专项(Z222021211);陕西省农业专项(K332021313)资助 |
| 摘 要： | 为探讨生草对渭北黄土高原苹果（Malus domestica）园土壤呼吸的影响，设置果园清耕、间作白三叶（Trifolium repens ）、间作小冠花（Coronilla varia）3个处理，于2012年4-11月利用SR1LP土壤呼吸仪监测了3个处理的土壤呼吸，分析了果园生草覆盖条件下土壤呼吸特征及其与土壤水热的相互关系。结果表明：生草与清耕处理 4-6月和8-11月土壤呼吸日变化呈单峰曲线，但生草处理果园土壤呼吸日变化峰值出现时间存在延后效应（4-6月）或推前效应（11月），且生草与清耕处理土壤呼吸日变幅存在明显差异，7月生草与清耕处理土壤呼吸的日变化格局不同；果园土壤呼吸季节变化呈明显的双峰变化趋势，但生草显著提高了果园土壤呼吸速率，不同月份不同处理之间的土壤呼吸差异显著（P<0.05）；生草与清耕果园土壤呼吸都与5 cm的土壤温度相关性最为显著，与土壤水分相关性不显著，生草处理果园土壤温度与土壤呼吸均呈显著的二次函数关系，而清耕处理果园土壤温度与土壤呼吸均呈显著的幂函数关系；多元回归法分析结果表明，土壤水热因子对土壤呼吸的协同影响高于土壤水热单因子的影响，可解释果园土壤呼吸时间变异的56%~85%。 |
| 关 键 词： | 果园生草 土壤呼吸 土壤水热因子 日动态 季节动态 |
| 收稿时间： | 2014-01-20 |
Influences of Interplanting Herbage on the Soil Respiration of Apple Orchard in Weibei Loess Plateau |
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| JIA Man-li,GUO Hong,DU Yi-fei,WANG Hai-tao,LI Hui-ke,CAO Wei-dong.Influences of Interplanting Herbage on the Soil Respiration of Apple Orchard in Weibei Loess Plateau[J].Acta Agrestia Sinica,2014,22(3):518-527. | |
| Authors: | JIA Man-li GUO Hong DU Yi-fei WANG Hai-tao LI Hui-ke CAO Wei-dong |
| Institution: | 1. College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China; 2. Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, Shaanxi Province 712100, China; 3. Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China |
| Abstract: | In order to understand the effects of interplanting herbage on the soil respiration of apple orchard in Weibei Loess Plateau, three different field treatments including clean tillage, interplanting Trifolium repens L. and interplanting Coronilla varia L. in apple orchard were designed and conducted from 2005 to 2012. Then, soil respiration rate was measured with an SR1LP chamber (Qubit Inc., Canada) from April to November in 2012. Results show that the daily variation of soil respiration rate presents single peak curve for all tested treatments during April to June and August to November, although the peak value of interplanting systems lags at the period from April to June or brings forward in November. Simultaneously, the diurnal variation of soil respiration was obviously different among treatments in July; seasonal fluctuation of soil respiration rate presents a bimodal peak curve. Meanwhile, the interplanting herbage plants significantly improve soil respiration and there is significant difference among different months (P<0.05). The soil respiration is significantly related to the soil temperature of 5 cm soil layer, whereas there is no significant correlation between soil respiration and soil moisture. The relationship between soil temperature and soil respiration presents a quadratic function in orchard with interplanting herbage, and a power function in orchard with clean tillage. The interactive effects of soil temperature and soil moisture on soil respiration are higher than a single factor that can explain about 56 to 85 percent of the temporal variation of soil respiration. |
| Keywords: | Interplanting herbage in orchard Soil respiration Soil hydrothermal factor Daily variation Seasonal variation |
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