Influence of straw pulp film mulching on water conservation of alpine degraded meadow in Tibet

Abstract

Abstract: The use of plastic film for mulching is very extensive because of its excellent properties and low cost. However, the massive use of plastic film poses an environmental risk, and in order to offer an alternative for water conservation of grassland soil, a comparison of straw pulp film and non-mulching was used to research the function of film in the conservation of soil water in alpine degraded meadows of Tibet. The relative humidity at the soil surface, soil temperature, soil compaction and water content in the straw pulp film treatment were better than in the CK, and the water content in May and June were 22.87% and 20.21% respectively, which were significantly better than the CK (n=5, P<0.05). At the same time, soil compaction at the surface and at 5 cm were 245 and 948 kPa, significantly different (n=5, P<0.05) from the CK. Mulching with straw pulp film gave a physical insulation to heat and obstruction to water evaporation, which helped retain soil moisture.

CLC Number:

S812

YU Cheng-qun, WU Jun-xi, GUAN Fa-chun. Influence of straw pulp film mulching on water conservation of alpine degraded meadow in Tibet[J]. Acta Prataculturae Sinica, 2013, 22(2): 318-321.

References

[1] 朴世龙, 方精云, 贺金生, 等. 中国草地植被生物量及其空间分布格局[J]. 植物生态学报, 2004, 28(4): 491-498.
[2] Hutjes R W A, Kabat P, Running S W, et al. Biospheric aspects of the hydrological cycle[J]. Journal of Hydrology, 1998, 212-213: 1-21.
[3] 吴建国, 吕佳佳. 气候变化对青藏高原高寒草甸适宜气候分布范围的潜在影响[J]. 草地学报, 2009, 17(6): 699-705.
[4] Potts D L, Huxman T E, Enquist B J, et al. Resilience and resistance of ecosystem functional response to a precipitation pulse in a semiarid grassland[J]. Journal of Ecology, 2006, 94: 23-30.
[5] 周华坤, 周立, 赵新全. 青藏高原高寒草甸生态系统稳定性研究[J]. 科学通报, 2006, 51(1): 63-69.
[6] 马辉, 梅旭荣, 严昌荣, 等. 华北典型农区棉田土壤中地膜残留特点研究[J]. 农业环境科学学报, 2008, 27(2): 570-573.
[7] Briassoulis D. Mechanical behavior of biodegradable agricultural films under real field conditions[J]. Polymer Degradation and Stability, 2006, 91: 1256-1272.
[8] Diaz F, Jimenez C C, Tejedor M. Influence of the thickness and grain size of tephra mulch on soil water evaporation[J]. Agricultural Water Management, 2005, 74: 47-55.
[9] Barbara Immirzi, Gabriella Santagata, Giuliano Vox. Preparation, characterisation and field-testing of a biodegradable sodium alginate-based spray mulch[J]. Biosystems Engineering, 2009, 102: 461-472.
[10] 杨青华, 韩锦峰, 贺德先, 等. 液体地膜覆盖棉花高产机理研究[J]. 中国农业科学, 2008, 41(8): 2520-2527.
[11] 张杰, 任小龙, 罗诗峰, 等. 环保地膜覆盖对土壤水分及玉米产量的影响[J]. 农业工程学报, 2010, 26(6): 14-19.
[12] 许香春, 王朝云. 国内外地膜覆盖栽培现状及展望[J]. 中国麻业, 2006, 28(1): 6-11.
[13] 卜玉山, 苗果园, 周乃健, 等. 秸秆与地膜覆盖玉米农田土壤水分时空动态变化——兼评回归等值线法的应用[J]. 土壤学报, 2004, 41(5): 795-802.
[14] Fang S Z, Xie B D, Liu J J. Soil nutrient availability, poplar growth and biomass production on degraded agricultural soil under fresh grass mulch[J]. Forest Ecology and Management, 2008, 255: 1802-1809.
[15] 关法春. 不同措施对重度苏打盐碱地改良效果的研究[D]. 北京: 中国科学院, 2009.