Soil Properties and Plant Growth Response to Litter in a Prolonged Enclosed Grassland of Loess Plateau, China
Soil Properties and Plant Growth Response to Litter in a Prolonged Enclosed Grassland of Loess Plateau, China
复制标题
DOI：
10.1007/s12583-019-1017-3
复制
发表时间：
2019-10
影响因子：
3.3
通讯作者：
Y. Xiong;Bing Yu;M. Bai;Xueyang Zhang;Guanhua Huang;A. Furman
中科院分区：
文献类型：
--
作者：
Y. Xiong;Bing Yu;M. Bai;Xueyang Zhang;Guanhua Huang;A. Furman
摘要封育和禁牧措施导致草地表层植物凋落物的积累，从而影响了土壤水分和养分的有效利用。在黄土高原长期封育草地上，研究了凋落物对土壤性质和植物生长的影响。进行了三种不同的窝处理，包括移除所有窝、原始窝水平的未处理的原位对照和双窝处理。枯落物处理试验表明，植物枯落物影响土壤表层水分。双凋落物原位样地土壤含水量普遍高于去除凋落物的样地。降雨后5天内，表层土壤凋落物清除样地的土壤水分消耗最快，而深层土壤凋落物清除样地的土壤水分消耗差异不明显。连续两年的试验表明，不同凋落物处理对土壤全碳、全氮及碳氮比的影响均不显著。凋落物去除处理小区的地上和地下生物量均低于原位处理和双凋落物处理小区。凋落物主要通过调节根区土壤水分的机械屏障影响植物生产。因此，通过长时间的凋落物处理实验，从养分角度了解植物生长对凋落物的长期响应是非常必要的。
The enclosure and ungrazing practices for grassland management result in accumulation of plant litter on soil surface thus affecting the available soil water and nutrients for plant production. We experimentally investigated the effects of litter on soil properties and plant growth in a prolonged enclosure grassland of Loess Plateau, China. Three different litter manipulations were conducted including removal of all litter, an untreatedin-situcontrol with original litter levels, and a double litter treatment. Litter treatment experiments demonstrated that plant litter affected the superficial soil water. Soil water content in plots within-situor double litter is generally higher than that with litter removal. The depletion of soil water up to five days post rainfall is fastest in litter removal plots for the top soil, but no evident difference for the deep ones. Different litter treatments have no significant impact on soil total carbon, nitrogen as well as carbon/nitrogen ratio for consecutive two years experiments. Both above- and below-ground biomasses in plots of litter removal were less than those in the plots ofin-situand double litter treatment. Litter affects plant production mainly through the mechanical barrier regulating root zone soil moisture. Therefore, prolonged litter manipulation experiments are desirable to understand the long-term response of plant growth on litter from nutrient aspect.