干旱区生态环境知识资源中心(Arid): 平茬柠条的土壤水分动态及生理特征

Arid

	平茬柠条的土壤水分动态及生理特征
其他题名	Soil moisture dynamics and physiological characteristics of moving of Caragana intermedia
	于瑞鑫 1; 王磊 2; 杨新国 1; 陈林1 ; 蒋齐 3; 王兴 1; 陈娟 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2019
卷号	39 期号:19 页码:7249-7257
中文摘要	平茬作为荒漠草原区柠条林优化管理的重要手段之一,深入探究平茬复壮阶段的土壤水分的恢复状况及其对生理特征的影响具有十分重要的意义。通过设置对比试验,研究了不同平茬年限柠条的土壤水分的时空分布及其周期性变化规律,并分析了其对净光合速率、蒸腾速率、水分利用效率等光合作用生理特征的影响,结果表明:(1)生长季年内变化,PCla-PC5a柠条在对土壤水分的保持能力均高于WPC柠条;对比不同平茬年限柠条土壤水分,PC3a增长迅速,PC4a水分条件最优,PC5a土壤水分消退逐渐向WPC柠条的土壤水分接近;土壤垂直剖面上,PCla-PC4a柠条根系活跃区的土壤水分随着平茬年份的增加,深层的土壤水分得到有效改善,到PC5a时开始回落。(2)不同平茬年限土壤含水量变化剧烈程度分别为PC4a>PC5a>WPC>PC2a>PC3a>PCla,且平茬措施对非根系活跃区的深层土壤水分影响不大,平茬后,对0-180cm土层深度的影响显著,且以平茬PC4a和PC5a的土壤水分周期性变化最长,振动强度变化最明显。(3)平茬早期(PCla-PC2a)的土壤水分并未迅速提高,此阶段柠条的光合作用受自身性状的影响大于对土壤水分的影响;平茬中期(PC3a-PC4a)的土壤水分对光合作用的影响大于柠条的补偿生长作用;平茬后期(PC5a),平茬柠条光合作用减弱及性状几乎不发生变化,土壤水分状况也开始接近WPC柠条。因此,对于荒漠草原平茬复壮阶段的柠条林的科学有效管理,PC5a柠条可作为饲草资源进行利用的最佳时段。
英文摘要	As one of the important means to optimize management of Caragana intermedia forest in the desert steppe,moving is of great significance to further explore recovery of soil moisture and its influence on physiological characteristics during the renew stage.By comparative experiments,the temporal and spatial distribution of soil moisture and its cyclical variation of Caragana intermedia were studied in different moving years.The effects of net photosynthetic rate,transpiration rate,and water use efficiency on photosynthesis physiological characteristics were analyzed.The results showed that:(1) During the growing season,the maintenance of PC1a-PC5a was higher than that of WPC.Compared to soil moisture of Caragana intermedia in different mowing years,PC3a increased rapidly and PC4a had the optimal moisture condition.The soil moisture of PC5a gradually subsided to the soil moisture of WPC.In the vertical section of the soil,the soil moisture in the deep layer was effectively improved with the soil moisture in the active area of PCla-PC4a roots increase in different mowing years.However,the soil moisture began to fall back in PC5a.(2) Intensity changes of soil moisture in different mowing years was PC4a>PC5a>WPC>PC2a>PC3a>PCla,and the moving measures have little effect on the deep soil moisture in the non-root activity area.The effect in 0-180cm soil depth was significant,while the soil moisture cyclical variation and the vibration intensity changed very obviously in PC4a and PC5a.(3) The soil moisture in the early stage of moving (PC1a-PC2a) did not increase rapidly.At this stage,the photosynthesis of Caragana intermedia was affected by its own traits more than the soil moisture.The effect of soil moisture on photosynthesis in the mid-moving period (PC3a-PC4a) was greater than the compensatory growth of Caragana intermedia.In the late stage of moving (PC5a),the photosynthesis of moving Caragana intermedia decreased and the traits hardly changed.The soil moisture status also began to approach WPC.Therefore,PC5a can be used as the best time of forage resources utilization for the scientific and effective management of Caragana intermedia forest in the stage of renew of desert steppe.
中文关键词	荒漠草原 ; 柠条 ; 平茬年限 ; 土壤水分动态 ; 周期变化 ; 生理特征
英文关键词	desert steppe Caragana intermedia moving years soil moisture dynamics cyclical variation physiological characteristics
语种	中文
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6597289
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316255
作者单位	1.宁夏大学, 西北土地退化与生态系统恢复宁夏省部共建国家重点实验室培育基地, 银川, 宁夏 750021, 中国; 2.宁夏大学;;南京大学国际地球系统科学研究所, 西北土地退化与生态系统恢复宁夏省部共建国家重点实验室培育基地;;, 银川;;南京, ;; 750021;;210093; 3.宁夏农林科学院荒漠化治理研究所, 银川, 宁夏 750002, 中国
推荐引用方式 GB/T 7714	于瑞鑫,王磊,杨新国,等. 平茬柠条的土壤水分动态及生理特征[J]. 宁夏大学,2019,39(19):7249-7257.
APA	于瑞鑫.,王磊.,杨新国.,陈林.,蒋齐.,...&陈娟.(2019).平茬柠条的土壤水分动态及生理特征.生态学报,39(19),7249-7257.
MLA	于瑞鑫,et al."平茬柠条的土壤水分动态及生理特征".生态学报 39.19(2019):7249-7257.