摘要
通过地面覆盖塑料薄膜、覆秸秆和种植三叶草,研究了不同地面覆盖处理对花椒林的生理、生态效应的影响.结果表明,6月份,秸秆覆盖的林地土壤含水量最高,较对照地高27.3%～32.3%,其次为三叶草林地,较对照地高17.2%～23.2%;地面覆膜提高了冠层气温和光合有效辐射,8:00～18:00,冠层气温较覆秸秆、种植三叶草和对照高0.3、0.9、0.7℃,光合有效辐射高22.2%、37.5%和46.7%;种植三叶草提高了林内空气温度,分别较覆秸秆、覆膜和对照林地高7.2%、18.0%和25.5%;花椒叶光合速率和蒸腾速率日变化趋势均为单峰型,光合速率日平均值为覆膜>覆秸秆>种植三叶草>对照,蒸腾速率日平均值为种植三叶草>覆膜>覆秸秆>对照.
The ground of Zanthoxylum bungeanum fores： were covered by plastic film, straw and planting Trifolium repens. The results showed that the soil water content in straw-covered condition in July is the highest than the other two measures, the water content of soil were increased by 17. 6%- 18.8% than that of control respectively. T. repens can increase the water content by 17.2%-23. 2% more than that of control. Plastic film can effectively increase the crown cover air temperature and photosynthetic active radiation. The crown cover air temperature under the cover of the film is 0. 3℃ higher than those of straw, 0. 9 ℃ than T. repens and 0. 7 ℃ than control. Photosynthetic active radiation were 22. 2%, 37.5% and 46.7% more than that of straw, T. repens and control at 8：00-18：00 respectively. The relative humidities of covering T. repens were 7.2%, 18.0% and 25.5% more than those of straw, film and control. Diurnal change of photosynthetic rate and transpiration rate showed two peaks under the conditions of these coverings. The diurnal change of photosynthetic rate under the covering is membrane〉 straw〉 T. repens control, while the diurnal change of transpiration rate is T. repens〉 membrane〉 straw〉 control test.
出处
《西北林学院学报》
CSCD
北大核心
2005年第4期27-30,共4页
Journal of Northwest Forestry University
基金
杨凌示范区科研基金(02KJ-10-2)
关键词
花椒
地面覆盖
生态效应
生理效应
Zanthoxylum bungeanum
film covering
ecological effect
physiological effect
