CAJ | 학술논문

[目的]探讨全膜双垄沟播技术改良荒漠化退化草原的效果,以期为扩大该技术的应用领域提供理论依据和技术贮备。[方法]在宁夏盐池荒漠化退化草原中采用常规方法补播丛生禾本科牧草,并对其进行起垄覆黑膜、起垄覆透明膜、起垄不覆膜和不起垄不覆膜平播的4种保育处理,通过分析各处理的土壤含水率变化规律及其对补播苗生长的影响,寻找最优处理方式。[结果]从7月到11月起垄覆黑膜、起垄覆透明膜、起垄不覆膜和平播4个处理的土壤平均含水率分别为9.88%、9.24%、8.75%和8.13%,各处理间差异显著;补播牧草的成活率分别是96.2%、93.4%、45.6%和28.3%,覆膜相对不覆膜成活率达到极显著水平。其中以覆黑膜具有较大优势,其垄顶土壤含水率有＂削峰填谷＂的缓冲作用,覆黑膜土壤水分含量比平种提高了21.5%,且对于1m以下土壤的水分补充量也是最大的。覆膜虽然增加了费用,但从总体效益分析,利润高于不覆膜。[结论]该研究为起垄覆黑膜技术在荒漠化退化的草原补播改良中的推广应用奠定了试验基础。
[목적]탐토전막쌍롱구파기술개량황막화퇴화초원적효과,이기위확대해기술적응용영역제공이론의거화기술저비。[방법]재저하염지황막화퇴화초원중채용상규방법보파총생화본과목초,병대기진행기롱복흑막、기롱복투명막、기롱불복막화불기롱불복막평파적4충보육처리,통과분석각처리적토양함수솔변화규률급기대보파묘생장적영향,심조최우처리방식。[결과]종7월도11월기롱복흑막、기롱복투명막、기롱불복막화평파4개처리적토양평균함수솔분별위9.88%、9.24%、8.75%화8.13%,각처리간차이현저;보파목초적성활솔분별시96.2%、93.4%、45.6%화28.3%,복막상대불복막성활솔체도겁현저수평。기중이복흑막구유교대우세,기롱정토양함수솔유＂삭봉전곡＂적완충작용,복흑막토양수분함량비평충제고료21.5%,차대우1m이하토양적수분보충량야시최대적。복막수연증가료비용,단종총체효익분석,리윤고우불복막。[결론]해연구위기롱복흑막기술재황막화퇴화적초원보파개량중적추엄응용전정료시험기출。
[Objective] This study aimed to provide theoretical basis and technologies for the application of planting in furrow and whole plastic-film mulching on double ridges. [Method] The conventional method was used to re-seed the bunch Gramineous forage in the degraded desert grassland in Yanchi, Ningxia Hui Autonomous Region. Four kinds of conservation treatments, namely, ridging with black film mulching, ridging with transparent film mulching, ridging with no mulching and the flatplanting with no ridging and mulching were conducted to the forage to analyze the effects of each treatment on soil moisture and seedling growth. [Result] From July to November, the moisture contents of ridging with black film mulching, ridging with transparent film mulching, ridging with no mulching and the flatplanting were respectivery 9.88%, 9.24%, 8.75% and 8.13%, showing significant differences among the treatments; the survival rates of re-seeding forage were 96.2% , 93.4% , 45.6% and 28.3% , and the mulching treatment showed significant difference with the unmulching treatments in survival rate. The treatment with black film mulching showed great advantage that its moisture content on ridge top had the buffering effect of ＂load shifting＂, and the soil moisture content of black mulching treatment increased 21.5% than the flatplanting. Black film mulching also had the largest water supplement amount in soil below 1 m. Although mulching cost too much, its overall benefits were higher than that with no mulching. [Conclusion] This study lays the experimental basis for the application of planting in furrow and whole plastic-film mulching on double ridges in improving degraded grassland desertification.