[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-se...[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.展开更多
基金Supported by the Key Technologies R & D Program of the Ningxia Hui Autonomous Region (2011ZYN051)~~
文摘[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.
