DRY MATTER PARTITIONING OF MAIZE PLANT AS AFFECTED BY WATER MANAGEMENT AT DIFFERENT GROWTH STAGES

Md Shahriar Kobir,Md Rashedur Rahman,A.K.M Mominul Islam

doi:10.26480/trab.01.2020.31.36

Abstract

The research work was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, in the fiscal year 2017-2018 to study the dry matter partitioning of maize plant affected by water management at different growth stages. The research was conducted in a split plot design with three replications where irrigation stages were allocated in main plots and varieties were allocated in sub plots. There were five irrigation management treatments viz. I0 – (No irrigation), I1 – (Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage), I2 – (Four leaf stage+ eight leaf stage + tasselling stage), I3- (Eight leaf stage + tasselling stage +grain filling stage), I4 -(Four leaf stage + tasselling stage+ grain filling stage), I5 -(Four leaf stage+ eight leaf stage+ grain filling stage) and there were three varieties viz. V1 – (BARI hybrid vutta-9), V2 – (BARI hybrid vutta-13), V3 – (pacific-559) in the experiment. The highest dry matter by root, culm, leaf, tassel and cob as well as by total dry matter and seed yield was obtained with the water management treatment I1(Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage) which is statistically similar to treatment I4(Four leaf stage + tasselling stage+ grain filling stage) and the highest dry matter by root, culm, leaf, tassel and cob as well as total dry matter and seed yieldwas obtained due to the varietal factor V3 (pacific-559). Interaction between I1 irrigation treatment and V3 varietal factor (I1V3) were found to be the best combination for maximum dry matter production which is statistically similar to I4V3 interaction. As I4 treatment and I4V3 interaction are cost effective than I1 treatment and I1V3 interaction, respectively, irrigation should be given at Four leaf stage, tasselling stage, and grain filling stage with variety pacific-559 for maximum dry matter as well as for maximum grain production in maize

Highlights

Maize (Zea mays) is one of the most important cereal crops of the world specially for the developing countries
The highest leaf dry weight (36.00 gplant-1) was observed with the interaction effect of I1 irrigation treatment and V3 varietal factor (I1V3) (Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage with pacific-559) which is statistically similar to I4V3 (Four leaf stage + eight leaf stage + grain filling stage with Pacific-559) interaction and the lowest leaf dry weight (14.50 gplant-1) was observed in I0V2 (No irrigation with BARI hybrid vutta-13) interaction (Table 5)
The highest culm dry weight (40.20 gplant-1) was observed with the interaction effect of I1V3 (Four leaf stage + eight leaf stage + tasselling stage+ grain filling stage with pacific-559) which is statistically similar to I4V3 (Four leaf stage + eight leaf stage + grain filling stage with Pacific-559) interaction and the lowest culm dry weight (9.70 gplant-1) was observed in I0V2 (No irrigation with BARI hybrid vutta-13) interaction (Table 5)

Summary

Introduction

Maize (Zea mays) is one of the most important cereal crops of the world specially for the developing countries. It is third in rank after wheat and rice. Maize is annual cross-pollinated crop having erect, thick and strong culms with nodes and internodes. It is normally monoecious with staminate and pistillate flowers produce on the tassel and ear. Improvement of the productivity of cereal maize is badly needed for attaining food security in the developing countries. For improving maize productivity more emphasis should be focused on the physiology of grain production in relation to the dry matter accumulation as the grain yield production of maize is closely related to the physiology of dry matter accumulation (Tanaka and Yamaguchi, 1972)

Objectives

Results

Conclusion