期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
荒漠草原放牧遗留效应和模拟降水对土壤粒径组成及有机碳的影响
1
作者 付净瑶 王忠武 《中国草地学报》 CSCD 北大核心 2024年第7期72-80,共9页
为研究荒漠草原土壤粒径组成及有机碳含量对不同强度放牧遗留效应和降水变化的响应,以内蒙古短花针茅荒漠草原为研究对象,在不放牧、轻度放牧、重度放牧3个不同放牧强度小区设置模拟降水试验平台并开展野外控制试验,4个降水梯度分别为减... 为研究荒漠草原土壤粒径组成及有机碳含量对不同强度放牧遗留效应和降水变化的响应,以内蒙古短花针茅荒漠草原为研究对象,在不放牧、轻度放牧、重度放牧3个不同放牧强度小区设置模拟降水试验平台并开展野外控制试验,4个降水梯度分别为减少50%自然降水、自然降水、增加50%自然降水、增加100%自然降水。于生长季8月进行土壤样品采集,测定了土壤粒径组成及土壤有机碳含量。结果表明:1)放牧遗留效应和降水变化及其交互作用均对土壤有机碳含量有显著影响(P<0.05),放牧遗留效应对土壤有机碳含量呈正向影响,而降水变化对土壤有机碳含量呈负向影响。2)放牧遗留效应和降水变化及其交互作用均对土壤黏粒、粉粒含量有显著影响(P<0.05),轻度放牧遗留效应下土壤黏粒、粉粒含量显著高于重度放牧遗留效应,增加降水和重度放牧遗留效应都会导致土壤中黏粒、粉粒含量减少。重度放牧遗留效应使土壤砂粒含量增加。3)放牧遗留效应和降水变化会直接影响土壤有机碳含量,也会通过影响土壤粒径组成间接对土壤有机碳含量造成影响。综上,轻度放牧遗留效应和适宜的降水量下短花针茅荒漠草原的土壤质地较好,有机碳含量较高,围封六年后留存的放牧效应依然对荒漠草原土壤有机碳含量及粒径组成有影响,放牧遗留效应和极端降水会导致土壤粒径组成发生改变,影响土壤有机碳的积累。 展开更多
关键词 荒漠草原 模拟降水 放牧遗留效应 土壤粒径组成 土壤有机碳含量
下载PDF
Grazing-induced legacy effects enhance plant adaption to drought by larger root allocation plasticity 被引量:1
2
作者 Feng-Hui Guo Xi-Liang Li +2 位作者 Jing-Jing Yin Saheed Olaide Jimoh Xiang-Yang Hou 《Journal of Plant Ecology》 SCIE CSCD 2021年第6期1024-1029,共6页
Aims To explore whether grazing-induced legacy effects on plants could benefit plants adaptation to drought.Methods A water-controlled experiment was conducted in the greenhouse,which with Agropyron cristatum and Care... Aims To explore whether grazing-induced legacy effects on plants could benefit plants adaptation to drought.Methods A water-controlled experiment was conducted in the greenhouse,which with Agropyron cristatum and Carex korshinskyi collected from free-grazing and enclosed plots on a typical grassland in Inner Mongolia.Important Findings We found that A.cristatum and C.korshinskyi collected from the free-grazing plot were less affected by drought in terms of ramet biomass,ramet number and total biomass than those collected from the enclosed plot.The enhanced adaptation to drought for plants collected from the free-grazing plot should partly be ascribed to the larger root biomass allocation plasticity under drought treatment.Our findings suggest that grazing management can be used to improve the adaptation of grassland plants to climate change. 展开更多
关键词 climate change GRAZING legacy effects DROUGHT root biomass allocation
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部