引用本文: | 吕英泽,赵宏亮,颜培轩,等.人工集雨条件下贺兰山蒙古扁桃土壤水分和生长的动态变化[J].灌溉排水学报,0,():-. |
| lv yingze,zhao hong liang,yan pei xuan,et al.人工集雨条件下贺兰山蒙古扁桃土壤水分和生长的动态变化[J].灌溉排水学报,0,():-. |
|
|
|
本文已被:浏览 316次 下载 0次 |
|
|
人工集雨条件下贺兰山蒙古扁桃土壤水分和生长的动态变化 |
吕英泽1, 赵宏亮1, 颜培轩1, 张海英2, 李佳1, 李静尧3, 邵磊磊2, 王芳4, 倪细炉2
|
1.宁夏大学;2.宁夏大学生态环境学院西北土地退化与生态恢复国家重点实验室培育基地;3.宁夏贺兰山森林生态系统国家定位观测研究站;4.宁夏大学地理科学与规划学院
|
|
摘要: |
提要:为提高贺兰山低山区有限降雨的利用效率,促进贺兰山自我维持植被恢复模式提供技术支撑。本研究以贺兰山低山区蒙古扁桃种群为研究对象,设置覆膜微地形、覆盖枯落物以及覆膜微地形+覆盖枯落物三种人工集雨处理,以无人工处理为对照,研究不同人工集雨方式处理下贺兰山低山区蒙古扁桃根区土壤水分以及蒙古扁桃生长的动态变化。结果表明:(1)不同集雨技术下蒙古扁桃土壤水分最高的是覆膜微地形+覆盖枯落物处理,其次是覆膜微地形,平均土壤含水率分别为11.91%和10.64% ,相较对照组的平均土壤含水率分别增加3.77%和2.5%;(2)集雨处理能够提高蒙古扁桃新梢生长量,覆膜微坑+覆盖枯落物(A4)处理下的新梢生长量最大,覆膜微地形处理(A2)次之,覆盖枯落物处理(A3)排在第三位,且相较于对照组A1的新梢生长量均有较大提高;集雨处理对蒙古扁桃叶片叶绿素含量的提升按照由高到低的排序分别为,覆膜微坑+覆盖枯落物(A4)处理>覆膜微地形(A2)>覆盖枯落物处理(A3),平均含量相较于对照组均有提高;(3)集雨处理,主要是覆膜微坑+覆盖枯落物处理(A4)和覆膜微地形处理(A2)下,植物叶面积和新梢生长量与土壤含水率之间存在显著相关性;(4)集雨技术通过调节土壤水分状况来促进蒙古扁桃灌丛的生长发育,提高叶片中叶绿素含量,从而提高蒙古扁桃抵御干旱的能力。“覆膜微地形+覆盖枯落物”和“覆膜微地形”的集雨技术对贺兰山浅山区蒙古扁桃灌丛进行可自我维持的植被恢复能够产生帮助。人工集雨处理能够改善土壤环境同时促进蒙古扁桃灌丛生长,有利于贺兰山低山区生态系统的重建和植被恢复的可持续发展。 |
关键词: 贺兰山低山区;蒙古扁桃;集雨;土壤水分 |
DOI: |
分类号:S152.7;S156.2 |
基金项目:宁夏重点研发项目(2020BFG03006);宁夏自然科学基金项目(2020AAC03107);国家自然科学基金项目(42067022,41761066);中央引导地方科技发展专项项目(2022FRD05001) |
|
Soil Moisture and Growth Dynamics of Prunus mongolica in The Helan Mountains under Artificial Rainfall Harvesting |
lv yingze1, zhao hong liang1, yan pei xuan1, zhang hai ying1, li jia1, li jing yao2, shao lei lei3, wang fang4, ni xi lu3
|
1.Ningxia University;2.Ningxia Helan Mountain Forest Ecosystem Research Station, State Forestry Administration;3.Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, School of Ecology and Environment, Ningxia University;4.School of Geographical Science and Planning, Ningxia University
|
Abstract: |
To provide technical support for the development of self-sustaining vegetation restoration model in the low elevation area of Helan Mountain. The effects of different artificial rainfall harvesting methods on soil moisture in Prunus mongolica root zone and physiological growth of P. mongolica in low elevation area of Helan Mountains were studied by setting three treatments, namely, mulching microtopography, mulching litter and mulch micro-topography + mulching litter, with no artificial treatment as the control. Results indicated that: (1) Among the effects of different artificial rain harvesting methods on soil moisture content in P. mongolica root zone, the most affected is the treatment of mulching micro-topography + mulching litter, followed by the treatment of mulching micro-topography, with an average soil moisture content of 11.91%, 10.64%. The soil moisture content of the control group was only 6.84%; (2) The rainfall collection treatment was able to increase the new growth of Mongolian lentil, with the largest new growth under A4 treatment, followed by A2, and A3 in the third place, and all of them had a greater increase in new growth compared with the control group A1.The rain harvesting treatment increased chlorophyll content of Mongolian lentil leaves in descending order of A4>A2>A3, with the average content increased compared with the control group;(3)Significant correlations were found between plant leaf area, new growth and soil water content under rainfall collection treatments, mainly mulching micro-topography + mulching litter (A4) and mulching microtopography A2); (4) Rainwater harvesting technology promotes the growth and development of Mongolian lentil scrub by regulating soil water conditions and increases chlorophyll content in leaves, thus improving the ability of Mongolian lentil to withstand drought. The rain harvesting techniques of "mulching microtopography + mulching dead litter" and "mulching microtopography" can be helpful for the self-sustainable vegetation restoration of Mongolian lentil scrub in the shallow mountainous areas of Helan Mountains. The artificial rainwater harvesting treatment can improve the soil environment and promote the growth of Mongolian lentil scrub, which is conducive to the reconstruction of the ecosystem and the sustainable development of vegetation restoration inLow elevation area of Helan mountain. |
Key words: Low elevation area of Helan mountain; Prunus mongolica; Rain harvesting; Water content |
|
|
|
|