干旱区生态环境知识资源中心(Arid): 柠条枝条覆盖对宁夏荒漠草原土壤水热及补播牧草生物量的影响

Arid

	柠条枝条覆盖对宁夏荒漠草原土壤水热及补播牧草生物量的影响
其他题名	Effects of mulching with caragana(Caragana intermedia)branches on soil moisture content and temperature and reseeded forage biomass in desertified grassland in Ningxia Province,China
	张茹; 李建平; 彭文栋; 王芳; 李志刚
来源期刊	草业学报
ISSN	1004-5759
出版年	2021
卷号	30 期号:4 页码:1004-5759
中文摘要	干旱是影响宁夏东部沙化区荒漠草地退化的主要自然因素,也是天然草地补播成功率低的主要原因,该地区大面积种植的柠条是土壤覆盖保水的丰富资源,但是缺乏相关研究。选择平坦的、未生长柠条的退化天然补播草地作为研究对象,在临近有柠条生长的草地平茬其柠条枝条用于试验覆盖,研究不同柠条覆盖厚度(TSM_0,覆盖0 cm;TSM_1,覆盖1 cm;TSM_2,覆盖2 cm;TSM_3,覆盖3 cm)对该地区荒漠草地0~40 cm土壤水热以及补播牧草地上生物量的影响。结果表明,柠条枝条覆盖显著提高了土壤含水量,并且随着覆盖厚度的增加逐渐增大,但2018和2019年间所有覆盖处理下0~20 cm土壤水分平均值与TSM_0之间差异不显著(P>0.05);在20~40 cm土层,3种柠条枝条覆盖厚度明显较对照提高了土壤水分含量,表现出TSM_3>TSM_2>TSM_1>TSM_0的趋势。结果还表明,柠条枝条覆盖还具有降低草地0~10 cm温度的作用,生长季8:00、14:00和18:00的土壤温度总体均随着柠条枝条覆盖厚度的增加出现降低趋势,且2019年土壤温度随着覆盖厚度的增加,变异系数也在减小,依次为4.6%、2.3%、 1.7%,表明覆盖对土壤温度的变化具有缓冲作用。补播牧草地上生物量亦随着覆盖厚度的增加而增大,蒙古冰草、沙打旺及补播的3种牧草的总生物量均与草地20~40 cm土壤水分呈显著正相关(P<0.05)。本研究表明,柠条枝条覆盖有效地改善了荒漠草地土壤的水热,提高了土壤墒情,为牧草种植提供了良好的生长环境,可为该地区及类似地区退化草地的补播改良提供技术借鉴。
英文摘要	As well as being the main natural factor affecting grassland degradation in the eastern desertification area of Ningxia,drought is also the primary limiting factor influencing natural grassland reseeding.Caragana(Caragana intermedia),which is extensively planted in grasslands in this area,is an abundant source of herbage for mulching for soil water retention.However,little research has been conducted to date on the use of caragana herbage for mulching.In this study,caragana branches were cut and collected from local grasslands,and were then transported and applied as a mulch for water retention on nearby grassland not planted with caragana.Four treatments were applied:control(no mulching,TSM_0),and caragana mulch applied on the soil surface of degraded grassland to a thickness of 1 cm(TSM_1),2 cm(TSM_2),and 3 cm(TSM_3).During the experimental period,the soil moisture content and temperature of the 0-40 cm soil layer were monitored,together with the above-ground biomass of reseeded forages.It was found that the mean soil water content was significantly increased by mulched caragana branches,and the thicker the mulch layer,the greater the soil moisture water.However,the soil water contents of the 0-20 cm soil layer did not differ significantly from TSM_0(P>0.05)in either of two seasons for which data were collected,2018 and 2019.In contrast,the three mulching treatments increased soil water content in the 20-40 cm soil layer compared with TSM_0,and exhibited a gradation TSM_3>TSM_2>TSM_1>TSM_0.Moreover,mulching with caragana branches decreased soil temperature of the 0-10 cm soil layer during the growing season.The soil temperatures at 8:00,14:00 and 18:00 were all decreased by mulching,and this effect increased with increasing thickness of caragana branch mulch.In addition,the coefficients of variation for soil temperature in 2019 were 4.6%,2.3%,1.7% for treatments TSM_1,TSM_2 and TSM_3,respectively,suggesting that the mulching treatments had a buffering effect on soil temperature fluctuation.We also found that the biomass of reseeded grasses increased as the thickness of caragana-branch mulch increased.Lastly,the biomasses of reseeding grass species Agropyron mongolicum and Astragalus adsurgens,as well as the total biomass of reseeding grasses were positively correlated with the soil water content of the 20-40 cm soil layer(P<0.05).In conclusion,the application of mulched caragana branches improved soil water content and reduced soil temperature in degraded grassland,and also created a beneficial environment for reseeded forage growth.Therefore,use of mulched caragana branches has the potential to provide a method for enhancement of reseeding and restoration of degraded grassland in this region and other similar environments.
中文关键词	柠条枝条覆盖 ; 土壤水分 ; 土壤温度 ; 补播牧草生物量 ; 宁夏荒漠草地
英文关键词	caragana branch mulching soil water content soil temperature forage biomass Ningxia desertified grassland
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6945298
来源机构	宁夏大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354192
作者单位	张茹, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 李建平, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 李志刚, 宁夏大学农学院, 银川, 宁夏 750021, 中国.; 彭文栋, 盐池农牧科学研究所, 吴忠, 宁夏 751500, 中国.; 王芳, 宁夏大学资源环境学院, 银川, 宁夏 750021, 中国.
推荐引用方式 GB/T 7714	张茹,李建平,彭文栋,等. 柠条枝条覆盖对宁夏荒漠草原土壤水热及补播牧草生物量的影响[J]. 宁夏大学,2021,30(4):1004-5759.
APA	张茹,李建平,彭文栋,王芳,&李志刚.(2021).柠条枝条覆盖对宁夏荒漠草原土壤水热及补播牧草生物量的影响.草业学报,30(4),1004-5759.
MLA	张茹,et al."柠条枝条覆盖对宁夏荒漠草原土壤水热及补播牧草生物量的影响".草业学报 30.4(2021):1004-5759.