Effects of Nitrogen and Phosphorus Rates on Growth, Yield and oil Cuntent of Four Varieties of Castor (Ricinus communis L.)

Description

– Effects of Nitrogen and Phosphorus Rates on Growth, Yield and oil Cuntent of Four Varieties of Castor (Ricinus communis L.) –

Download Effects of Nitrogen and Phosphorus Rates on Growth, Yield and oil Cuntent of Four Varieties of Castor (Ricinus communis L.). Agronomy students who are writing their projects can get this material to aid their research work.

Abstract

Three trials to study the effects of N and P rates on growth, yield, and seed oil content of four castor varieties were conducted during the rainy seasons of 2006 – 2008 on the research farm of the Institute for Agricultural Research, A.B.U Samaru Zaria,(11⁰ 11‟ N, 07⁰ 38E, and 686m above sea level).

The treatments, which consisted of three levels of N (0,60 and 120 kg/ha), three levels of P (0, 7.92, and 15.84 kg/ha), and four castor cultivars (Ex-Brazil 1, Ex-Brazil 2, Ex-India 1, and Ex-India 2) were laid out in split-plot design with a factorial combination of N and P levels allocated to the main plots.

While the four varieties were assigned to the subplots the treatments were replicated three times. The results revealed that the application of 120 kg N/ha and 15.84 kg P/ha produced significantly higher growth, yield, and seed oil content compared with the two lower N and P rates.

Introduction

Castor bean (Ricinus communis L.) belongs to the family Euphorbiaceae. It was first named and described by Carl Von Linne (Linneaus) who used the term Communis to describe the plant‟s common occurrence (communis meaning “Common”),

and used the inventive term Ricinus to refer to the interesting tick appearance of the seed, which resembles a huge tick engorged with blood (Brigham, 1970 a and b).

Castor plant, although commonly referred to as “bean” is not a legume. It is a non-food oilseed crop, whose seed is inedible in the raw state. It is mainly grown for its seeds which contain oil that has many pharmaceutical, medicinal, and industrial properties despite its potentially toxic effects (Weiss, 1971).

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