| 半干旱区径流聚集工程云杉人工林土壤水分及生长效果研究 |
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| 引用本文： | 李国林,张韬,张建宇,赵越,杨冰,安彪. 半干旱区径流聚集工程云杉人工林土壤水分及生长效果研究[J]. 甘肃农业大学学报, 2016, 0(3). DOI: 10.3969/j.issn.1003-4315.2016.03.018 |
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| 作者姓名： | 李国林 张韬 张建宇 赵越 杨冰 安彪 |
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| 作者单位： | 1. 甘肃省外资项目管理办公室,甘肃 兰州,730000;2. 甘肃省畜牧业产业管理局,甘肃 兰州,730000;3. 甘肃农业大学林学院,甘肃 兰州,730070;4. 定西市巉口林业试验场,甘肃 定西,743000;5. 定西市安定区车道岭林场,甘肃 定西,743000 |
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| 基金项目： | 甘肃省国际科技合作计划项目“速生杨抗性及生物量提高技术合作研究”(1204WCGA022)． |
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| 摘 要： | 【目的】评价半干旱区径流聚集工程技术下人工云杉林木的发育状况及生态环境效应.【方法】在定西市安定区对漏斗式聚流抗种植的云杉×沙棘混交林和燕尾式聚流坑种植的云杉纯林的土壤水分状况、林木发育状况进行测定.【结果】在年均降水量480mm的条件下,径流聚集工程有效拦蓄了降水径流,保障了林木生长发育对水分的要求,云杉×沙棘混交林与云杉纯林都表现出良好的适应性.与云杉混交林相比,云杉纯林具有较大造林密度和林木蓄积量,具有更高的经营利用价值;而云杉×沙棘混交林具有复层拦蓄,具有更好的生物多样性与生态效益;在生长期(2005~2014年)年降水量450.9 mm的情况下,云杉纯林与混交林2 m内土层平均土壤含水率为16.91%和12.43%,说明云杉纯林土壤水分适宜性高于混交林,具备更好的土壤水分条件.【结论】半干旱区漏斗式聚流坑和燕尾式鱼鳞坑径流聚集工程效果显著;在节水工程实施中云杉纯林和云杉×沙棘混效林均表现出了较高适宜性和较好的经济和生态效益.
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| 关 键 词： | 径流聚集工程 退耕还林工程 云杉混交型 云杉纯林 林木生长量 土壤水分 |
A study on soil moisture and Picea asperata plantation growth on runoff gathering engineering in semi-arid region |
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| Abstract: | [Obj ective]To evalute the growth situation and ecological and envionmental effects in semi-arid region,runoff collecting proj ect was conducted in Anding District,Dingxi City,Gansu Province.[Method]Spruce forest growth and soil water content were studied under funnel-type pit for runoff collec-ting and swallow-tail-type pit for runoff collecting condition.[Result]Under the average annual rainfall of 480 mmconditions,runoff collecting proj ect effectively stored the runoff,protected the water requirements for the growth of spruce forest,sea buckthorn mixed forest and pure forest of Piceaasperata showed good suitability.Compared with spruce mixed forest,the spruce pure forest with larger planting density and for-est volume,had more management and utilization of high value.Spruce and sea buckthorn mixed with trees and shrubs of the double layer was held,with better biological diversity and ecological benefits.In the growth period (2005~2014)rainfall in the case of 450.9 mm,the pure spruce forest and mixed forest of 2 m soil layer in the average soil water content was 16.91% and 12.43%.That showed pure spruce forest soil moisture suitability was higher than that of mixed forest,so it had better soil moisture condition.[Conclusion]Funnel-type pit for runoff collecting and swallow-tail-type pit for runoff collecting all show good runoff collecting effect,and two species of spruce forest also show high suitability,good management and utilization value,and ecological benefit. |
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| Keywords: | runoff collecting proj ect proj ect of returning farmland to forest spruce mixed forest spruce pure forest soil moisture |
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