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Anna Kusumawati Benito Heru Purwanto Makruf Nurudin 《Soil Science and Plant Nutrition》2020,66(1):206-213
ABSTRACT Sugarcane is a strategic commodity in Indonesia. It is usually raised in a monoculture system. There is a lack of information about the effects of extended sugarcane monoculture on the soil carbon fraction. The aim of this study was to determine the relative changes in the soil organic C fractions in response to the duration of sugarcane monoculture on Entisols, Inceptisols, and Vertisols. The measured variables were the percentages of sand, silt, and clay, organic matter (OM), total nitrogen (TN), pH (H2O), cation exchange capacity (CEC), NH4 +, NO3 -, labile carbon fraction (soil carbon mineralization (C-Min), soil microbial carbon (C-Mic), and carbon particulate organic matter (C-POM)), and stable carbon fraction (humic and fulvic acids). Soil type with sugarcane monoculture period had significant influences on the percentages of clay, sand, silt, CEC, and pH (H2O). Soil type and sugarcane monoculture period had no apparent significant effect on C-Min or C-POM but did significantly influence C-Mic. The humic and fulvic acid levels in all three soil types were affected by the duration of sugarcane monoculture. To establish the impact of long-term sugarcane monoculture on the physicochemical properties of soils with various textures, it is more appropriate to measure the soil stable carbon fractions such as humic and fulvic acid rather than the soil labile carbon fractions such as C-Min, C-POM, or C-Mic. 相似文献
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[目的]借鉴和应用中亚国家盐碱土改良理论、技术、方法,完善新疆盐碱土改良的理论技术体系.[方法]通过对吉尔吉斯斯坦楚和平原农业资源的考察,应用DPS9.5,Excell2003等统计软件进行数据整理分析.[结果]含有碳酸氢钠的地下水反复作用楚和平原农田土壤,导致土壤耕层进行频繁的盐渍化过程,是盐碱化加重的成因;采用甜菜轮作和灌排结合的优化推荐施肥体系是楚和平原农田盐碱土改良的创新举措;楚和平原盐碱土经过改良后,土壤质地以含碳的砂质粘土为主,土壤肥力高,腐殖质和适宜耕作的盐分含量均为2.65;,其含量随着土层深度递减,土壤中被吸附的钠离子复合体呈弱碱性,改良效果明显.[结论]借鉴吉尔吉斯斯坦楚河平原盐碱土改良措施,新疆盐碱土改良应以水肥为中心,改良和培肥相结合,轮作模式和排盐 相结合的生态改良模式为主. 相似文献
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[目的]分析吉尔吉斯斯坦共和国(以下简称吉国)与中国新疆土壤有机质的变化情况及原因,为该国土壤培肥提供对策,保障其农业可持续发展.[方法]采用实地考察及相关文献资料方法,分析研究吉国7个州22～ 35 a间的耕地土壤有机质变化情况和中国新疆30 a间的耕地土壤有机质变化情况.[结果]吉国耕地土壤有机质含量近30年呈不断下降趋势;新疆耕地土壤有机质近30年来多趋于上升,个别地区有机质呈下降趋势.[结论]新疆氮磷钾长期配合施用并配施有机肥的施肥方式有利于保持并增加土壤有机质;吉国在有限施用有机肥情况下,很少或不施化肥的施肥方式造成长期消耗土壤肥力,有机质呈下降趋势. 相似文献
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