【摘要】：采用大田試驗(yàn)的方法,在云南省元謀縣小雷宰流域內(nèi)壤土、砂壤土和重壤土3種質(zhì)地土壤上,以熱研5號柱花草為材料,研究土壤質(zhì)地對柱花草生長發(fā)育、生物量及土壤有機(jī)質(zhì)、有機(jī)碳、全氮和全磷的影響。試驗(yàn)結(jié)果表明:3種土壤質(zhì)地上種植柱花草,柱花草地上部和地下部生長量和生物量表現(xiàn)幼苗期增加緩慢,而分枝期后增加快的趨勢。壤土耕性好,兼有砂土和重壤土的優(yōu)點(diǎn),有利柱花草地上部分的生長發(fā)育,柱花草地上部生長量、生物量及改善土壤肥力方面顯著高于重壤土。砂壤土有利于柱花草根系向深層土壤生長,柱花草地下部生長量、生物量及根瘤顯著高于種植在重壤土。在3種土壤質(zhì)地種植柱花草后,土壤有機(jī)質(zhì)、有機(jī)碳、全氮和全磷均有上升趨勢。綜合而言,通氣性和保肥保水能力居中的壤土更適合柱花草的生長發(fā)育及干物質(zhì)的積累。
[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.
【作者單位】： 云南省農(nóng)業(yè)科學(xué)院熱區(qū)生態(tài)農(nóng)業(yè)研究所;
【基金】：國家自然科學(xué)基金項(xiàng)目(41361099) 云南省技術(shù)創(chuàng)新人才培養(yǎng)(2011CI066)依托項(xiàng)目(RQS 2006-1,RQS 2008-1)資助
【分類號】：S158;S541.9

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