Effect of organic fertilizers and cultivation of two legum crops on soil chemical properties

Sharifi, Saeedeh (2018) Effect of organic fertilizers and cultivation of two legum crops on soil chemical properties. Masters thesis, University of Mohaghegh Ardabili.

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Abstract

Dense cultivation of agricultural products and the excessive use of fertilizers and chemical inputs have led to poor quality and reduced fertility of soils. Recovering residues, composting and leguminous crops are amoung the methods for improving the quality of soils. In order to investigate the effect of organic fertilizers and cultivating two types of legumes on soil chemical properties, a field experiment in one of the farms around Ardabil. A factorial experiment was a randomized complete block design. In which three types of organic fertilizers(compost, vermicompost and chicken manure), the mixing percentage(equivalent of 0, 75 and 150 kg N ha-1) and legume species( without cultivation, Pea and Lentil) were considered in three replications. The soil was harvested before being cultured and its physicochemical properties included pH, EC, Pav, Kav, Naaq, Kaq, Caaq, %OC, %N, Ca+Mg, CCE, soil texture and SAR were measured. Some of the growth characteristics and argonomic traits such as plant height, leaf size, flower number, number of lateral branches, number of pods, leaf chlorophyll, the number of seeds per pod was determined. At harvest time, dry matter and shoot yield was determined from each sampling plot, all the chemical parameters mentioned above were determined for organic soils treated with organic fertilizers. Also some chemical parameters were determined for plants. The investigate the effect of different treatments on soil chemical properties, one_way ANOVA and comparison of averages were performed by Duncans test using SAS and Excel software. The results of this study showed that compost in the soil increased acidity and consumed(150 kg ha-1) of all three organic fertilizers increased phosphorus absorption.Vermicompost in chickpea increased the absorption of phosphorus and increased the number of seeds per pod in lentil. Chiken manure in the soil also increased calcium and in the chekpea, the increase in the number of lateral branches was increased. It is suggested that in future studies, other high levels of fertilizers use and several successive crop seasons should be used so you can get meaningful results.

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