摘要
[目的]探究砒砂岩不同类型区及不同土地利用方式对土壤水分、有机碳和全氮含量的影响,对于砒砂岩区进一步发展具有重要指导作用。[方法]以内蒙古准格尔旗砒砂岩覆土区的13年生沙棘林地、6年生沙棘林地、天然草地及砒砂岩裸露区草地和砒砂岩覆沙区的天然草地、柠条林地、农地、退耕5年地共8个样地为研究对象,通过测定0—100 cm深度不同土层土壤含水量、有机碳和全氮含量,研究和比较了不同土层土壤水分、有机碳和全氮含量与变化规律。[结果](1)覆土区(13年生沙棘林地152.36 mm、6年生沙棘林地165.16 mm、天然草地160.97 mm)0—100 cm土层土壤储水量均高于覆沙区(天然草地73.03 mm、柠条林地66.56 mm、农地79.70 mm、退耕5年地107.03 mm)。(2)裸露区草地土壤有机碳含量均低于覆土区和覆沙区,0—100 cm土壤有机碳储量(1.97 kg/m^(2))分别比覆土区天然草地、6年生沙棘林地、13年生沙棘林地和覆沙区天然草地、柠条林地、农地、退耕5年地分别低了2.24 kg/m^(2),2.36 kg/m^(2),1.74 kg/m^(2),1.23 kg/m^(2),0.66 kg/m^(2),2.58 kg/m^(2),1.21 kg/m^(2)。(3)各类型区相比,裸露区草地全氮储量最低(0.18 kg/m^(2)),比覆土区天然草地和覆沙区天然草地全氮储量均低0.22 kg/m^(2)。[结论]覆土区13年生沙棘林地和覆沙区柠条林地0—100 cm土层土壤储水量、有机碳和全氮储量均低于相同类型区天然草地储量,柠条和沙棘种植一定年限后,综合考虑水保效益后可以对其进行间伐,减少灌草竞争,从而加速其林下植被的自然演替,确保砒砂岩区生态环境的可持续发展。
[Objective]Exploring the effects of different types of Pisha Sandstone and different land use patterns on soil water,organic carbon and total nitrogen content plays an important guiding role in the further development of Pisha Sandstone area.[Methods]13-year-old Seabuckthorn(Hippophae rhamnoides)woodland,6-year-old Seabuckthorn woodland,natural grassland in the soil-covered Pisha Sandstone area of Jungar banner of Inner Mongolia,natural grassland in the exposed Pisha Sandstone area,and natural grassland,Caragana korshinskii woodland,farmland and 5-year-old abandoned farmland in the sand-covered Pisha Sandstone area,a total of eight sample plots were used as the research objects.By measuring the soil water content,organic carbon and total nitrogen content of different soil layer at a depth of 0—100 cm,the contents and variation of soil water,organic carbon and total nitrogen in different soil layers were studied and compared.[Results](1)The soil water storage in 0—100 cm soil layer in the soil-covered Pisha Sandstone area(13-year-old Seabuckthorn woodland(152.36 mm),6-year-old Seabuckthorn woodland(165.16 mm),natural grassland(160.97 mm))was higher than that of the sand-covered Pisha Sandstone area(natural grassland(73.03 mm)and Caragana korshinskii woodland(66.56)mm),farmland(79.70 mm),and 5-year-old abandoned farmland(107.03 mm)).(2)Soil organic carbon content of grassland in the exposed Pisha Sandstone area was lower than that in the soil-covered and sand-covered Pisha Sandstone area.Soil organic carbon storage in the 0—100 cm soil layer(1.97 kg/m^(2))was lower than that of the natural grassland,6-year-old and 13-year-old Seabuckthorn woodland in the soil-covered Pisha Sandstone area,natural grassland,Caragana korshinskii woodland,farmland and 5-year-old abandoned farmland in the sand-covered Pisha Sandstone area by 2.24 kg/m^(2),2.36 kg/m^(2),1.74 kg/m^(2),1.23 kg/m^(2),0.66 kg/m^(2),2.58 kg/m^(2) and 1.21 kg/m^(2),respectively.(3)Compared with each type of Pisha Sandstone area,the total nitrogen storage
作者
刘军
杨凯齐
刘科
马章怀
LIU Jun;YANG Kaiqi;LIU Ke;MA Zhanghuai(Water Resources Development Center,Water Resources Bureau of Jungar Banner,Jungar Banner,Inner Mongolia 010300,China;College of Natural Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China)
出处
《水土保持研究》
CSCD
北大核心
2023年第4期47-52,共6页
Research of Soil and Water Conservation
基金
“十三五”国家重点研发计划项目“鄂尔多斯高原砒砂岩区生态综合治理技术”(2017YFC0504504)
准格尔旗科技计划项目(2017007)。
关键词
砒砂岩裸露区
砒砂岩覆土区
砒砂岩覆沙区
土壤水分
有机碳
全氮
exposed Pisha Sandstone area
soil-covered Pisha Sandstone area
sand-covered Pisha Sandstone area
soil water
organic carbon
total nitrogen
