Global Advanced Research Journal of Agricultural Science (GARJAS) ISSN: 2315-5094
September 2019 Vol. 8(8): pp. 265-270
Copyright © 2019 Global Advanced Research Journals

 

Full Length Research Paper

Spatial Variability in Soil Properties and Plant Nutrient of Paddy Rice in Mwea, Kenya

Kundu C.A. *1, 2T. Masunaga, 2K. Sato, 2M. Ishii, 3A.Yamauchi, 4D. Makihara and 5R.K. Wanjogu

 

1Kenya Agricultural and Livestock Research Organization (KALRO), Box 169-50100, Kakamega, Kenya

2Faculty of Life and Environmental Sciences, Shimane University, 1060 Nishikawatsu-cho, Matsue city, Shimane 690-8504 Japan

3Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan

4International Co-operation Centre for Agricultural Education (ICCAE), Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan

5Mwea Irrigation Agricultural Development Centre (MIAD), Box 210-10303, Wang’uru, Kenya

*Corresponding Author's Email: carolinekundu@gmail.com

Accepted 02 June, 2019

 

                                                                                            Abstract

Lowlands constitute major environment for rice cultivation in Kenya, but declining soil productivity has led to low poor quality yields. This study assessed soil and yield quality of rice in Mwea irrigation scheme. Surface 0-15cm soil was sampled for laboratory analysis. Rice straw and grain was collected and analysed for total nutrient. Results obtained for soil and plant were evaluated basing on nutrient guidelines for rice. Results indicated that soil pH was moderately high and salt concentration negligible (< 0.4 dS/m). Soil total carbon was moderately high while total nitrogen was low. Available phosphorus, sulphur and silica all exceeded deficiency level for rice. Exchangeable Ca2+ and Mg2+ dominated compared to exchangeable K+ and Na+; and as a result severe K+ deficiency because of cation imbalance existed. Among micronutrients, soil Fe, Mn and Cu were high while Zn was deficient. Grain yields were below optimum and plant analyses revealed deficiencies in straw total sulphur, K and Ca in some units. Grain samples showed deficiency in total Ca, Fe, K, Mg and S. Soil condition and nutrient concentrations affected nutrient accumulation in straw and grain. Appropriate soil management practices should be considered for improved quality and quantity of yields.

Keywords: Cation imbalance, lowlands, Mwea irrigation scheme, soil nutrient

 

 

 

 

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