Effects of Organic Matter Levels on Soil Organic Carbon Fractions, Nutrient Uptake, and Growth and Development of Sweet Corn (<I>Zea mays var. rugosa</I>)
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Abstract
Organic matter (OM) is an organic compound that contains mainly organic carbon which is composed of labile and recalcitrant organic carbon. Soil organic carbon plays a significant role in soil properties improvement, increasing soil fertility and productivity. Therefore, the effects of organic matter levels on soil properties, soil organic carbon fractions, nutrient uptake, and growth of sweet corn in a pot were studied. Soil sample with low organic matter was collected and adjusted soil organic matter at different levels with cow manure (2, 3, and 4% OM) at 5 replications in a completely randomized design. Increasing soil organic matter levels resulted in a decrease in soil bulk density. In contrast, field capacity, soil pH, total nitrogen, available phosphorus, extractable potassium, calcium, and magnesium, very labile and labile fraction of organic carbon in the soil, nutrient uptake, and growth of sweet corn were increased as compared to the control treatment. Therefore, the result indicated that increasing organic matter in soil not only promoted sweet corn’s growth rate, but also improved soil properties, increasing labile soil organic carbon fraction and enhancing plant nutrients level.
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