土壤质地对柱花草生长发育、生物量及土壤肥力变化的影响

发布时间：2018-09-08 07:02

【摘要】：采用大田试验的方法,在云南省元谋县小雷宰流域内壤土、砂壤土和重壤土3种质地土壤上,以热研5号柱花草为材料,研究土壤质地对柱花草生长发育、生物量及土壤有机质、有机碳、全氮和全磷的影响。试验结果表明:3种土壤质地上种植柱花草,柱花草地上部和地下部生长量和生物量表现幼苗期增加缓慢,而分枝期后增加快的趋势。壤土耕性好,兼有砂土和重壤土的优点,有利柱花草地上部分的生长发育,柱花草地上部生长量、生物量及改善土壤肥力方面显著高于重壤土。砂壤土有利于柱花草根系向深层土壤生长,柱花草地下部生长量、生物量及根瘤显著高于种植在重壤土。在3种土壤质地种植柱花草后,土壤有机质、有机碳、全氮和全磷均有上升趋势。综合而言,通气性和保肥保水能力居中的壤土更适合柱花草的生长发育及干物质的积累。
[Abstract]:In this paper, the field experiment was carried out to study the effect of soil texture on the growth and development of Stylostachys mongolicum in Xiaolaizhai Watershed, Yuanmou County, Yunnan Province, on three soil textures, namely, loam, sandy loam and heavy loam. Effects of biomass and soil organic matter, organic carbon, total nitrogen and total phosphorus. The results showed that the growth and biomass of aboveground and underground parts of Stylostachys mongolicum increased slowly in seedling stage, but increased rapidly after branching stage. Loam had the advantages of both sandy soil and heavy loam. The growth and development of aboveground part of Stylostachys spp. The growth of aboveground part biomass and soil fertility were significantly higher than those of heavy loam soil. Sand loam soil is beneficial to the growth of Stylosanthes root system to deep soil. The growth of underground part biomass and root nodule of Stylostachys mongolicum are significantly higher than those in heavy loam soil. Soil organic matter, organic carbon, total nitrogen and total phosphorus increased after planting Stylosanthes in three soil textures. In general, loam soil with aeration and water retention ability is more suitable for growth and dry matter accumulation of Stylosanthes.
【作者单位】：云南省农业科学院热区生态农业研究所;
【基金】：国家自然科学基金项目(41361099) 云南省技术创新人才培养(2011CI066)依托项目(RQS 2006-1,RQS 2008-1)资助
【分类号】：S158;S541.9

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