Effect of Flag Leaf Clipping on Growth, Yield and Yield Attributes of Hybrid Rice in Boro Season

Sumya Fatima

doi:10.11648/j.ajbes.20190502.12

Abstract

The experiment was carried out at the Experimental Field of Agricultural Botany Department, Sher-e-Bangla Agricultural University, Dhaka-1207, Bangladesh, during October, 2017 to May, 2018 to study rice varieties (viz. BRRI Hybriddhan1, BRRI hybrid dhan2, Heera2, Heera4, Nobin and Moyna) were used for this study. The experiment was laid out in Split-plot Design with three replications. All the test varieties exhibited superiority in control condition. The tallest plant (115.2) was recorded from Moyna at harvest effect of flag leaf clipping on growth yield, and yield attributes of hybrid rice varieties in Boro season. Six hybrid stage and higher individual flag leaf area (81.61cm2) was observed from Heera4. Penultimate leaf area and third leaf area (78.98 cm2 and 46.95cm2, respectively) were obtained from BARIhybriddhan2. The highest number of leaves (67.33) and spikelet panicle-1 (219) were observed from Heera4. Among test rice varieties, higher grain yield (6.01tha-1) and biological yield (13.45 tha-1) were also achieved from Heera4. Days to maturity was significantly varied from 123 (Nobin) to 145 (BRRI Hybriddhan1) among the studied varieties. Chlorophyll content (SPAD value) in penultimate leaf after 15 days after heading, grain filling duration, yield contributing characters and yield were investigated after cutting of flag leaf. Regardless of variety, all the studied parameters were exhibited superiority in control treatment. Chlorophyll and nitrogen content (SPAD value) in penultimate (1.35% to 17.27%) and grain filling duration were increased (4.5 to 6.25 days) by virtue of clipping of flag leaf. The highest number of effective tillers hill-1, filled grains panicle-1, weight of 1000 grains, grain yield, straw yield, biological yield were recorded from Heera4 under control condition. The clipping of the flag leaf reduced grain yield from 15.69% to 29.43% in the test Boro rice varieties.

Highlights

Rice (Oryza sativa L.) is the primary food of about 65% of the world’s population [1]
The experiment that was carried out at the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from November 2017 to May 2018 to the effect of flag leaf clipping on growth and yield of hybrid rice varieties
Sumya Fatima et al.: Effect of Flag Leaf Clipping on Growth, Yield and Yield Attributes of Hybrid Rice in Boro Season under the subtropical climate which was characterized by three distinct seasons, winter season from November to February and hot season or the pre-monsoon period from March to April and monsoon period from May to October

Summary

Introduction

Rice (Oryza sativa L.) is the primary food of about 65% of the world’s population [1]. In the world rice are cultivated that covers total area of about 160 million hectares and producing more than 700 million tons every year. It is known as a main staple food for over half of the world’s population, especially in South-east Asia along with rapidly growing populations [4]. Rice is the main staple food and the source of major energy for Bangladeshi people that covers 80% of the total cropped area as about 12 million hectares [6]. It is strongly reported that about 10.4 million hectares of land in Bangladesh is used for the cultivation of rice which is about 85% of total cropped area and the annual production of Rice is 30.42 million tons [7]

Methods

Results

Conclusion