特伦甘纳邦梅达克地区红、红土和黑土甘蔗种植评价

C. Mahesh, Rajeshwar Malavath, D. Balaguruvaiah, G. Vidyasagar
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摘要

在特伦甘纳邦Medak区的甘蔗种植土壤中进行了土壤调查,以评估土壤特征,通过确定潜力和局限性来评估土地,从而从发达土地利用决策的角度提出适当的管理方案,以有效利用资源。在0 ~ 15cm和15 ~ 30cm深度采集土壤样品(表层128个,地下128个),分析土壤形态、物理、理化和速效主要养分状况。表层和地下土壤均表现出良好的结构变异,表层土壤表现为颗粒状到亚角块状结构,地下层位土壤表现为亚角块状到角块状结构。该地区的质地等级为砂质壤土、砂质粘土壤土、砂质粘土至粘土壤土和粘土。土壤的稠度在干燥、潮湿和潮湿条件下分别从松散到坚硬、非常易碎到坚固、非粘性、非塑性到非常粘性、非常塑性。反应的pH值在极酸到中碱性之间,EC为无盐。表层土壤有机碳含量由低到高,地下土壤有机碳含量由低到中。土壤速效氮低至中等,表层土壤磷、钾含量中至高。主要的土壤限制因素包括质地、侵蚀、坡度、深度、排水和低有机碳、低氮和微量元素有效性。如果能够进行改良,那么在边际适宜的区域可以转为中等适宜到高度适宜种植不同作物。
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Evaluation of some sugarcane growing red, red laterite and black soils of Medak district of Telangana
A reconnaissance soil survey was undertaken in sugarcane growing soils of Medak district of Telangana to assess the characteristics of soils, evaluate the land by identifying potentials and limitations to suggest suitable management options in the perspective of developed land use decision for effective utilization of resources. Soil samples (128 surface and 128 subsurface) were collected at a depth of 0-15cm and 15-30cm and analyzed for morphological, physical, physico-chemical and available major nutrient status. All the surface and subsurface soils well developed structural variation and exhibited granular to sub angular blocky structure in surface and sub angular blocky to angular blocky in subsurface horizon. The textural classes of the district are sandy loam, sandy clay loam, sandy clay to clay loam and clay. The consistence of soils varied from loose to hard, very friable to firm, non-sticky, nonplastic to very sticky, very plastic in dry, moist and wet conditions, respectively. The pH ranges between extremely acidic to moderately alkaline in reaction and EC was non-saline. The organic carbon content ranged from low to high in surface soils and low to medium in subsurface soils. The soils are low to medium in available N, medium to high in P and K in surface soils. Major soil constraints include texture, erosion, slope, depth, drainage and low organic carbon, low availability of N and micronutrients. If the improvements could be done, there is scope that the area under marginally suitable may be converted to moderately suitable to highly suitable for the cultivation of different crops.
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