平茬措施对柠条生理特征及土壤水分的影响
文献类型：期刊论文
| 作者 | 杨永胜 ; 卜崇峰 ; 高国雄 |
| 刊名 | 生态学报
 |
| 出版日期 | 2012 |
| 卷号 | 32期号:4页码:1327-1336 |
| 关键词 | 平茬 pruning 净光合速率 photosynthetic rate 蒸腾速率 transpiration rate 水势 water potential 土壤水分 soil water |
| 其他题名 | Effect of pruning measure on physiology character and soil waters of |
| 中文摘要 | 通过对比试验，研究了平茬措施对柠条的净光合速率、蒸腾速率、水分利用效率、枝水势，以及土壤水分含量的影响。结果 表明: ( 1) 平茬措施对柠条生理特征的影响因其生长发育阶段而异。其中，在花期( 6 月份) ，平茬柠条日平均净光合速率较对 照( 未平茬柠条) 降低14． 72%，日平均蒸腾速率提高27． 31%，水分利用效率较对照低33． 33%; 随着柠条的生长发育( 7 月、8 月、9 月) ，平茬柠条日平均净光合速率逐渐升高最终高于对照，日平均蒸腾速率的差距也不断缩小; 相应的其水分利用效率增 加较快( 对照柠条、平茬柠条增幅分别达108． 3%、222． 5%) ，至自然生长末期( 9 月) ，平茬柠条较对照高出4． 76%。( 2) 平茬柠 条枝水势的日变化和月变化均高于对照。( 3) 在整个生长季，平茬柠条地的平均土壤含水量在50—240 cm 范围内均明显高于 对照，且平茬措施显著降低了0—300 cm 剖面各层土壤水分变异情况。( 4) 相关分析显示，平茬措施对柠条生理特征及土壤水 分有重要影响。可见，采取平茬措施的第1 年，平茬措施对柠条同时产生消极的生理影响和积极的土壤水分效应。弄清平茬措 施的更新复壮机理，需要开展更多的深入研究工作。 |
| 英文摘要 | Caragana korshinskii Kom． sprouts readily when the stems are browsed by animals and is widely distributed in the China Loess Plateau and Hexi Corridor． C． korshinskii is a very ecologically adaptable shrub with an extensive root system capable of adsorbing large amounts of water and resistant to adverse environmental conditions． It is also very useful as forage and fuel wood． However，C． korshinskii degrades after 6—8 years as the branches die back and it is attacked by serious insect pests，decreasing its economic and ecological value． Pruning was used to stimulate regeneration of C． korshinskii，and resulted in desirable effects． Leaves and branches of C． korshinskii grew rapidly after cutting． However， little is known about the interaction between pruning and the rapid growth，and this lack of knowledge inhibits progress in managing planted shrublands． This study compares unpruned ( control) to pruned ( treatment) C． korshinskii plants to study the effects of pruning on the photosynthetic rate，transpiration rate，water use efficiency，the branch water potential for this kind of plant，and soil moisture content． First，the results show the effects of pruning on the physiological characteristics of C． korshinskii varied at different stages of growth． During the June flowering season，the net diurnal photosynthetic rate and water use efficiency of pruned C． korshinskii declined by 14． 72% and 33． 33%，respectively，when compared with the control． The corresponding diurnal transpiration rate of pruned plants increased by 27． 31% compared |
| 语种 | 中文 |
| 公开日期 | 2014-06-17 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/5255]  |
| 专题 | 水土保持研究所_水保所知识产出(1956-2013) |
| 推荐引用方式 GB/T 7714 | 杨永胜,卜崇峰,高国雄. 平茬措施对柠条生理特征及土壤水分的影响[J]. 生态学报,2012,32(4):1327-1336. |
| APA | 杨永胜,卜崇峰,&高国雄.(2012).平茬措施对柠条生理特征及土壤水分的影响.生态学报,32(4),1327-1336. |
| MLA | 杨永胜,et al."平茬措施对柠条生理特征及土壤水分的影响".生态学报 32.4(2012):1327-1336. |
入库方式： OAI收割
来源：水土保持研究所
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