FERTILITY MANAGEMENT OF A NEWLY DEVELOPED GENOTYPE OF PEA (Pisum sativzzrn L.)

Abstract

A THESIS Submitted to Bangabandhu Sheikh Mujibur Rahman Agricultural University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE ('MS) Department of Soil Science Suintier Term, 1999A field experiment was conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University farm (lUring the period from November 10, 1997 to March 1. 1998 to determine the optimum requirement of N, P, and K for maximum yield of the advanced line (Local \Vhite) of pea. There were 14 treatment combinations comprising of four levels of N (0, 30, 60, and 90 kg N/ha), four levels of p (0. 50. 75, and 100 kg P05/ha). 4 levels of K (0, 30, 60, and 90 kg K 2 R/iizobiuni strain (N 0 and N,04. 0 0/ha), two levels of inoculum as a 3. and one level of organic matter (cow dung) at the rate of 10 c/ha. Moderate rate of N. P. and K application (N 60 kg, P K1 0 : 60 kg/ha) was found to be the balanced combination of the nutrient elements to give the highest yield of green pod (13.12 f/ha) and matured seed (2.27 t/ha) and the maximum total uptake of N (123.62 kg/ha), P (4.78 205 75 kg, and kg/ha), and K (69.03 kg/ha) by the plants and as well as the largest sized green seeds (41.51 g) and matured seeds (17.68 g) per 100 seeds. Although. the lughest level of N application (90 kg/ha) with the same rates of P and K application produced the tallest plants (94.44 cm), maximum number of branches per plant (3.02) and the highest number of pods per plant (8.07) gave 4.5 % lower yield of green pods and 19.3 % lower yield of matured seeds and as well as 3.21 % lower uptake of N, 1.46 % P. and 13.42 % K as compared.to the highest yield and the highest nutrient uptake observed under moderate application of nutrients strain along with one third of optimum N (20 kg/ha) and moderate amount of P and K (75 kg P,O and 60 kg K elements. Seed inoculation with Rhizobiwn 2 0/ha) was found to be encouraging to give satisfactory and acceptable yield of 12.37 t/ha of green pod (only 5.7% lower than the highest yield) of pea. From the viewpoint of yield and nutrient uptake of garden pea and the nutrient requirement of the crop, the N, P. and K combination at the rates of 60 kg N, 75 kg PO, and 60 kg K 2 0/ha was considered to be die balanced combination of fertilizer nutrients for achieving the maximum output through cultivation of pea in Shallow Red-Brown Terrace Soil of BSMRAU farm