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首页> 外文期刊>African Journal of Agricultural Research >Potassium forms of soils under enset farming systems and their relationships with some soil selected physico-chemical properties in Sidama zone, Southern Ethiopia
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Potassium forms of soils under enset farming systems and their relationships with some soil selected physico-chemical properties in Sidama zone, Southern Ethiopia

机译：埃塞俄比亚南部西达玛地区耕作制度下土壤钾的形态及其与某些土壤理化特性的关系

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摘要

Soil potassium is classified as unavailable, readily available and slowly available (fixed) K forms. A research was conducted to determine the distribution of forms of K (water soluble K, exchangeable K, non-exchangeable K and total K) and their relation with some soil properties under enset farming systems of Sidama zone in South Ethiopia. The soils were collected from ‘Qola’ (dry, hot tropical climate and moist to humid), ’Woinadega’ (warm subtropical climate) and ‘Dega’ (wet and cool temperate climate). In the study, coefficient of variance (CV%) for sand, soil organic matter (SOM), total nitrogen (TN), available phosphorus, water soluble K, exchangeable K, non-exchangeable K and percent potassium saturation were high (>30%). The high, medium and low proportions of acidic reaction were determined in Hula, Dale and Hawassa-Zuriya districts, respectively. The concentrations of total K in the soils ranged from 1358.9 to 3181.5 (mg/kg) where the Hula district soil show the lowest value. Water soluble K and exchangeable K concentrations in the soils ranged from 14.7 to 110.5 mg/kg and 130.9 to 1134.9 mg/kg, respectively, where the lowest values were indicated by Hula district. The Hawassa-Zuriya district soils had the highest concentrations in both exchangeable and water soluble K. The non-exchangeable K concentrations varied from 241.5 to 1714.9 mg/kg. It constituted the highest proportion of the total K measured in the soils, while the proportion of water soluble K in the total K measured was the lowest. Nearly all soils of Hula and Dale districts indicated low ratio of K:Mg. Almost all of the Hula district soils and about 50% of the Dale district soils had potassium saturation percent (KSP) values below critical level. Significant indirect and direct associations existed among soil physico-chemical properties. All forms of soil K correlated significantly and positively with pH, PBS and silt, and negatively correlated with SOM and Al+3.
机译：土壤钾素被归为不可用，容易获得和缓慢可用（固定）的钾形态。进行了一项研究，以确定在南埃塞俄比亚的西达玛地区的耕作制度下，钾的形态分布（水溶性钾，可交换钾，不可交换钾和总钾）及其与某些土壤性质的关系。土壤是从“ Qola”（干燥，炎热的热带气候和潮湿到潮湿），“ Woinadega”（亚热带温暖的气候）和“ Dega”（潮湿和凉爽的温带气候）收集的。在研究中，沙，土壤有机质（SOM），总氮（TN），有效磷，水溶性钾，可交换钾，不可交换钾和钾饱和百分比的变异系数（CV％）高（> 30） ％）。分别在呼啦，戴尔和哈瓦萨-祖里亚地区确定了酸性反应的高，中和低比例。土壤中的总钾浓度在1358.9至3181.5（mg / kg）之间，其中呼拉地区的土壤中K最低。土壤中的水溶性钾和可交换钾浓度分别为14.7至110.5 mg / kg和130.9至1134.9 mg / kg，其中最低值以呼拉地区表示。 Hawassa-Zuriya地区的土壤中可交换和水溶性K的浓度最高。不可交换的K浓度在241.5至1714.9 mg / kg之间。它在土壤中测得的总钾中所占比例最高，而水溶性K在测得的总K中所占比例最低。呼拉和戴尔地区的几乎所有土壤均表明钾与镁的比例较低。几乎所有的呼拉地区土壤和约50％的达勒地区土壤钾饱和度百分比（KSP）值均低于临界水平。土壤理化性质之间存在显着的间接和直接联系。所有形式的土壤钾均与pH，PBS和淤泥显着正相关，而与SOM和Al + 3负相关。

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