西鄂尔多斯铁路防护林柠条锦鸡儿和沙冬青对不同管护措施的生理生态响应

摘要/Abstract

摘要： 对西鄂尔多斯铁路防护林中滴灌栽植围封、无灌溉栽植围封和天然围封样地中柠条锦鸡儿和沙冬青的生理生态响应特点进行了研究。结果表明:滴灌栽植围封样地中柠条锦鸡儿和沙冬青比另两样地中有较好的水分状况和生长状况,较高的蒸腾速率和净光合速率。两种植物在滴灌栽植样地中蒸腾速率和净光合速率日变化都呈单峰曲线;在无灌溉栽植围封和天然围封样地中的蒸腾速率、净光合速率日变化都呈双峰曲线,有较明显的光合“午休”现象。3个样地间,柠条锦鸡儿及沙冬青的水分利用效率（WUE）差异不显著,说明本研究中的滴灌量没有使植物的WUE低于其在自然降水条件下的值。此外,柠条锦鸡儿对水分条件变化的响应较为敏感,水分条件改善时可大幅提高生产力;而沙冬青对水分条件变化的响应较平稳,水分条件改善时生产力提高幅度相对较小。可见柠条更适合用于建立滴灌人工防护植被,而沙冬青更适合自然状态下的恢复。

关键词: 西鄂尔多斯, 柠条锦鸡儿, 沙冬青

Abstract: This paper studied the ecophysiological response characteristics of C. korshinskii and A. mongolicus in drip-irrigation enclosed site, no-irrigation enclosed site and natural enclosed site in the shelter-forest alone the railway in the western Ordos, in order to provide scientific proof for better maintaining the stability of shelter-forest along railway. The results showed that the C. korshinskii and A. mongolicus growing in drip-irrigation enclosed site grew well, and have better water condition, higher transpiration rate and net photosynthesis rate. The diurnal changes of transpiration rate and photosynthesis rate of these two species in drip-irrigation enclosed site were single-peak curves, while that in the no-irrigation enclosed site and the natural enclosed site were double-peak curves. These two species in the later two sites had obvious siesta phenomena of photosynthesis. The water use efficiency (WUE) of these two species in the three sites was roughly the same, which indicated that the amount of drip-irrigation did not make the WUE of these two species in the drip-irrigation enclosed site lower than the value obtained under the condition of natural precipitation. In addition, C. korshinskii was more sensitive to the changes of water condition, thus when water condition is ameliorated, this species can enhance its productivity greatly. Whilst, the responses of A. mongolicus to the changes of water condition were more obtuse, thus even when water condition is improved, the productivity of this species will increase relatively less. Therefore, C. korshinskii is more suitable for the construction of planted defending vegetation with drip-irrigation, whilst A. mongolicus is more fitful for the recovery of vegetation under natural conditions.

Key words: western Ordos, C. korshinskii, A. mongolicus

中图分类号:

Q948. 1

郭宏宇, 杨劼, 郭景山, 蔡超, 曹云. 西鄂尔多斯铁路防护林柠条锦鸡儿和沙冬青对不同管护措施的生理生态响应[J]. 中国沙漠, 2005, 25(1): 81-87.

GUO Hong-yu, YANG Jie, GUO Jing-shan, CAI Chao, CAO Yun. Ecophysiological Responses of Caragana korshinskii and Ammopiptanthus mongolicus in Shelter-forest along Railway in Western Ordos to Different Management Measures[J]. JOURNAL OF DESERT RESEARCH, 2005, 25(1): 81-87.

参考文献

[1]王志强,刘宝元,徐春达,等. 连续干旱条件下黄土高原几种人工林存活能力分析[J].水土保持学报,2002,16（4）:25-29.

[2]杨文斌,任建民,贾翠萍. 柠条抗旱的生理生态与土壤水分关系的研究[J].生态学报, 1997, 17（3）:239-244.

[3]马成仓,高玉葆,郭宏宇,等. 小叶锦鸡儿、中间锦鸡儿和柠条锦鸡儿地理渐变性Ⅱ.光合特性和水分代谢特性[J]. 植物学报,2003,45（10）:1228-1237.

[4]蒋志荣. 沙冬青抗旱机理的探讨[J]. 中国沙漠, 2000,20（1）: 71-74.

[5]周宜君,刘春兰,冯金朝,等. 沙冬青抗旱、抗寒机理的研究进展 [J]. 中国沙漠,2001,21（3）:312-316.

[6]张利平,王新平,刘立超,等. 沙坡头主要建群植物油蒿和柠条的气体交换特征研究[J]. 生态学报,1998, 18（2）:133-137.

[7]张利平,王新平,黄子琛,等. 沙漠地区沙冬青的气体交换特征研究[J]. 西北植物学报, 1998,18(2): 207-213.

[8]董学军, 杨宝珍,郭柯,等. 几种沙生植物水分生理生态特征的研究[J]. 植物生态学报,1994,18（1）:86-94.

[9]王孟本,李洪建,柴宝峰. 柠条(Caragana korshinskii)的水分生理生态学特征[J]. 植物生态学报,1996,20(6): 494-501.

[10]皱东生.大豆叶片光合、蒸腾日变化及其与生态因子的相关分析[J].植物生态学与地植物学学报,1990,14(4):350-357.

[11]郑有飞,万长建,颜景义,等.小麦的水分利用效率及其最优化问题[J].中国农业气象,1997,18（4）:13-17,28.

[12]邓雄, 李小明, 张希明,等. 多枝柽柳气体交换特性研究[J]. 生态学报,2003 ,23（1）:180-187.

[13]刘家琼, 邱明新. 沙冬青植物群落研究 [J]. 中国沙漠, 1995, 15(2): 109-115.

[14]崔骁勇,陈佐忠,杜占池. 半干旱草原主要植物光能和水分利用特征的研究[J]. 草业学报,2001,10(2): 14-21.

[15]肖春旺,周广胜,马风云. 施水量变化对毛乌素沙地优势植物形态与生长的影响[J]. 植物生态学报, 2002, 26(1) : 69-76.

[16]Noble P S. Root distribution and seasonal production in the northwestern Sonaran Desert for a C3 shrub, a C4 bunchgrass and a CAM leaf succulent [J]. American Journal of Botany, 1997, 84:949-955.

[17]王慧. 环境因子对冬小麦水分利用效率的影响[J]. 生态学报,1996,16(6): 584-590.

[18]崔骁勇, 杜占池, 王艳芬. 内蒙古半干旱草原区沙地植物群落光合特征的动态研究[J]. 植物生态学报, 2000, 24(5): 541-546.

[19]肖春旺, 董鸣, 周广胜, 等. 鄂尔多斯高原沙柳幼苗对模拟降水量的响应 [J]. 生态学报,2001,21(1): 171-176.

[20]周海燕,张景光,赵亮,等. 湿润条件下几种锦鸡儿属灌木的气体交换特征及调节机制[J]. 中国沙漠, 2002,22(4):316-320.

[21]冯金朝, 周宜君, 周海燕,等. 沙冬青对土壤水分变化的生理响应[J]. 中国沙漠, 2001 ,21（3）:223-226.