Soil Chemical Properties, Sunflower Growth and Yields as Affected by Double Digging, Mulch and Compost in Central Kenya

J. Miriti, D. Thomas, C. Gachene
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引用次数: 3

Abstract

Double digging as a form of deep tillage and the between late October and late December. The utilisation of compost and mulch for improved crop experiments were conducted on a humic Nitisol production in the densely populated areas of Kenya (FAO-UNESCO, 1988) whose characteristics are is rapidly gaining attention the Kenya Institute of presented in Table I. Organic Farming (KIOF, 1994). The aim of double digging is to loosen the deep soil layers for intensive crop production. Compost is aimed at supplying essential plant nutrients and enhancing soil physical properties through addition of organic matter (FAO, 1977; Pfirter et al., 1981). Organic matter has beneficial effects on soil fertility because it increases nutrient storage capacities (Tisdale et al., 1985; Woomer et al., 1995). Mulch modulates soil diurnal temperature, reduces evaporative soil water loss and improves infiltration (Russell, 1988). All these have positive influences on crop growth.
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肯尼亚中部双重挖掘、覆盖和堆肥对土壤化学性质、向日葵生长和产量的影响
在10月下旬至12月下旬之间进行两次深挖。利用堆肥和覆盖物改良作物的试验是在肯尼亚人口稠密地区进行的腐殖质硝土肥料生产(粮农组织-教科文组织,1988年),其特点正迅速引起肯尼亚研究所的注意,见表一。有机农业(KIOF, 1994年)。双重挖掘的目的是使深层土壤松动,以便进行集约化作物生产。堆肥的目的是通过添加有机物来提供必需的植物养分和增强土壤的物理特性(粮农组织,1977年;Pfirter et al., 1981)。有机质对土壤肥力有有益影响,因为它增加了养分储存能力(Tisdale等人,1985;Woomer et al., 1995)。覆盖物调节土壤日温度,减少蒸发土壤水分损失并改善渗透(Russell, 1988)。这些都对作物生长有积极的影响。
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