摘要
为了修复荒漠草原重度退化草地生态系统功能,试验选择适生的本土野生优良牧草种,采用农机与农艺的有机结合等综合配套技术,在正常降水年份内研究天然降水与土壤剖面体积含水率的动态变化规律及其内在关联性,以实现退化草地土壤水分的高效利用。结果表明,对重度退化草地采取早春深翻可减少40~60 cm土壤水分损失达64.97%;在最适宜时间段内(7月至8月中旬),采用干播等雨法播种可以使土壤平均含水率少损失26.91%,根的长度增加1.05倍,地上生物量增加2.10倍。此外,利用一次性完成“平、开、播、压、覆”程序的多功能天然草原沟播机沟播,能使土壤含水率提高9.05%,相应的成苗率提高26.5%。建议上述成熟的综合配套修复退化草地技术在生产实践中大面积示范应用。
In order to restore ecological function of severe degraded grasslands in desert steppe,effects of spatial-temporal changes of climate and soil moisture on restored degraded grassland in Yanchi,Ningxia were determined.In this study,spatial-temporal changes of rainfall and soil profile moisture,as well as their correlations in normal climate year were firstly determined.Then,many good native forages were selected and planted by integrated farm machine and agronomic measures,in order to improve soil water use efficiency.Result showed,64.97%soil water between 40~60 cm was lost under deep tillage in early spring for severe degraded grasslands.However,the best seed time is from July to middle August,and an average of 26.91%soil water could be saved by seen forage before a rainfall.Meanwhile,the roots of forages increased 1.05 times,and above-ground biomass increased 2.10 times,compared with control.Moreover,if flatting,diching,seeding and earthing were completed by a grassland lister deep-furrow drill in on time,then 9.05%soil water would be increased,and 26.5%planting percent would be increased.In all,the above integrated technologies could be extended in restoration for severe degraded grasslands.
作者
彭文栋
刘定鑫
马锋茂
冒秀凤
胡凤巧
谢伟娇
张灵瑜
孙丽婷
Peng Wendong;Liu Dingxin;Ma Fengmao;Mao Xiufeng;Hu Fengqiao;Xie Weijiao;Zhang Lingyu;Sun Liting(Yanchi Scientific Institute of Agriculture and Husbandry,Yanchi,Ningxia 751500)
出处
《宁夏农林科技》
2021年第4期34-39,共6页
Journal of Ningxia Agriculture and Forestry Science and Technology
基金
国家重点研发计划项目“荒漠草原退化草地修复及生产力提升技术研发与示范”(2016YFC0500505)。
关键词
荒漠草原
土壤体积含水率
本土化
近自然化
重度退化草地
Desert steppe
Soil volumetric moisture
Localization
Near naturalization
Severely degraded grassland
