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首页> 外文期刊>Communications in Soil Science and Plant Analysis >Soil Organic Carbon, Phosphorous, and Potassium Status in Rice-Wheat Soils of Different Agro-climatic Zones in Indo-Gangetic Plains of India
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Soil Organic Carbon, Phosphorous, and Potassium Status in Rice-Wheat Soils of Different Agro-climatic Zones in Indo-Gangetic Plains of India

机译：印度-印度恒河平原不同农业气候区水稻-小麦土壤中的有机碳，磷和钾状况

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摘要

The status of available macronutrients [phosphorus (P) and potassium (K)] and soil organic carbon (SOC) of the surface soil under a rice-wheat cropping system was studied in 40 districts of the Indo-Gangetic Plains (IGP) of India. The soil samples were collected from the farmers' fields in four transects (Trans-, Upper, Middle, and Lower Gangetic Plains) of the IGP. The selection of farmers, villages, blocks, and districts within an agro-climatic zone (ACZ) was done on the basis of a multistage statistical approach. The available macronutrients were characterized as low, medium, and high. In Trans-Gangetic Plains, SOC, available P, and available K were in the ranges of 0.06-0.86%, 6.7-85.1 kg ha−1, and 50-347 kg ha−1, respectively. In Upper Gangetic Plains, the respective values were in the ranges of 0.05-2.55%, 4.5-155.0 kg ha−1, and 45 to 560 kg ha−1. Similarly, in Middle Gangetic Plains, these values were in the ranges of 0.04-2.01%, 4.7-183.7 kg ha−1, and 72-554 kg ha−1, respectively. In Lower Gangetic Plains, respective values were 0.12-1.78%, 2.2-112.0 kg ha−1, and 83-553 kg ha−1. In Trans-Gangetic plains, the majority of the soils in the midplains ACZ representing intensively cultivated rice-wheat system area were low to medium in SOC and available P, whereas available K status was medium to high. Irrespective of the agroclimatic variations, more than 90% of the soils were low to medium in SOC and available P with a marginal deficiency of K. The majority of the coarse-textured soils in Shiwaliks were found to have low to medium SOC and available P, whereas less intensively cultivated arid zone soils were high in SOC, available P, and available K. In Upper and Middle Gangetic Plains, the majority of the soils tested medium for SOC and medium to high in available P and K. The dominance of medium status of available P in these soils could be due to mining of soil P by the rice-wheat cropping system practiced in these regions for more than 300 years. In Lower Gangetic Plains, the SOC was medium to high in most of the soils, whereas available P and K were high. Recent introduction of the rice-wheat system on intensive scale in these traditionally rice-growing areas resulted in less mining of SOC, P, and K.View full textDownload full textKeywordsAgro-climatic zones, available phosphorous, available potassium, Indo-Gangetic Plains, macronutrients, organic carbon, rice-wheat systemRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/00103624.2012.670341
机译：在印度-印度恒河平原（IGP）的40个区域研究了稻麦系统下表层土壤中可用的常量营养物[磷（P）和钾（K）]和土壤有机碳（SOC）的状况。 。从IGP的四个样带（横贯，上，中和下恒河平原）的农民田地采集土壤样品。在农业气候区（ACZ）内对农民，村庄，街区和地区的选择是基于多阶段统计方法进行的。可用的常量营养素的特征是低，中和高。在跨恒河平原，SOC，有效磷和有效钾分别在0.06-0.86％，6.7-85.1 kg ha -1 和50-347 kg ha 的范围内分别为“ 1”。在上恒河平原，各自的值分别在0.05-2.55％，4.5-155.0 kg ha -1 和45至560 kg ha â1-1的范围内。 sup>。同样，在恒河中部平原，这些值的范围是0.04-2.01％，4.7-183.7 kg ha -1 和72-554 kg ha -1 / sup>。在下部恒河平原，分别为0.12-1.78％，2.2-112.0 kg ha -1 和83-553 kg ha -1 。在跨恒河平原上，ACZ中平原地区代表集约耕作水稻-小麦系统区域的大部分土壤的SOC和速效磷处于中低水平，而速效钾状态则处于中高水平。不论农业气候变化如何，超过90％的土壤SOC为中低至P，有效磷含量为K的边际不足。在Shiwaliks的大多数粗纹理土壤中，SOC为低至中等，而集约耕作程度较低的干旱区土壤的SOC，速效磷和速效钾含量较高。在恒河上游和中部平原，大多数土壤均测试了SOC的中度含量以及速效磷和速效钾的中等至高水平。这些土壤中有效磷的状况可能是由于在这些地区实行了300多年的水稻-小麦种植系统对土壤P的开采。在下部恒河平原，大多数土壤的有机碳含量中等至较高，而有效磷和钾含量较高。在这些传统的水稻种植区，最近采用了集约化规模的稻麦系统，从而减少了SOC，P和K的开采。查看全文下载全文关键词农业气候区，可利用的磷，可利用的钾，印度恒河平原，大量营养素，有机碳，稻麦系统相关变量var addthis_config = {ui_cobrand：“泰勒和弗朗西斯在线”，servicescompact：“ citeulike，netvibes，twitter，technorati，delicious，linkedin，facebook，stumbleupon，digg，google，更多”，pubid： “ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/00103624.2012.670341

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