Leaf Characteristics and Yield Performance of Mungbean ( Vigna radiata L.) Varieties under Different Levels of Shading

The Agriculturists Pub Date : 2018-01-26 DOI:10.3329/AGRIC.V15I2.35463

M. A. Hossain, M. Hasan, S. Sikder, A. Chowdhury

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引用次数: 3

Abstract

An experiment was carried out to evaluate the leaf characteristics and yield performances of mungbean ( Vigna radiata L.) under different light levels at the Crop Physiology and Ecology Research Field of Hajee Mohammad Danesh Science and Technology University, Dinajpur during March to June 2016. The experiment was laid out in a split plot design with three replications. Three light levels (L 100 - 100 % light intensity, L 75 - 75 % light intensity and L 50 - 50% light intensity) were assigned in the main plots and four varieties (BARl Mung-6, BINA Mung-8, BINA Mung-5 and BU Mug-4) were assigned in subplots. Mosquito nets of different pore size were used for maintaining 75 and 50 percent light intensity. Leaf area was increased due to reduced light levels in all mugbean varieties but the increment was significant in BINA Mung-5 and BINA Mung-8 only at 75% light intensity at 40 days after sowing and only in BARI Mung-6 with L 50 and BU Mug-4 with L 75 and L 50 at 50 days after sowing. Due to reduced light levels, leaf dry weight was affected more in BINA Mung-5 and BU Mug- 4 than BARI Mung-6 and BINA Mung-8. Leaf thickness was reduced under shade in all the mungbean varieties, except in BU Mug-4 at 75% light intensity, and the reduction in leaf thickness was mainly due to the reduction in thickness of spongy layer. The palisade layer thickness was influenced insignificantly but spongy layer thickness was increased in BINA Mung-5 at 100% light intensity. The grain yields (t ha -1 ) of BARI Mung-6 and BINA Mung-8 remained stable under partial shade condition but the grain yield of BINA Mung-5 and BU Mug-4 was reduced drastically under partial shade condition. Higher leaf dry weight, number of pods plant - 1, seeds pod -1 , and heavier grains in BARI Mung-6 and BINA Mung-8 contributed to the higher grain yield plant -1 under partial shade condition than in BINA Mung-5 and BU Mug-4. The Agriculturists 2017; 15(2) 40-51

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绿豆(Vigna radiata L.)叶片特性及产量特性不同遮荫水平下的品种

2016年3 - 6月，在位于迪纳杰浦尔的哈吉穆罕默德达内什科技大学作物生理与生态研究基地进行了不同光照条件下绿豆(Vigna radiata L.)叶片特性和产量性能的试验研究。试验采用三次重复的分割图设计。主地块分配3个光照水平(l100 ~ 100%光照强度、l75 ~ 75%光照强度和l50 ~ 50%光照强度)，子地块分配4个品种(BARl Mung-6、BINA Mung-8、BINA Mung-5和BU Mug-4)。使用不同孔径的蚊帐，保持75%和50%的光强。所有品种的叶面积均因光照水平降低而增加，但BINA绿5和BINA绿8只有在75%光照强度下，播后40天叶面积增加显著，而BINA绿6和BINA绿4只有在播后50天l75和l50下叶面积增加显著。由于光照水平降低，BINA绿-5和BU Mug- 4对叶片干重的影响大于BARI绿-6和BINA绿-8。除BU Mug-4外，其余绿豆品种遮荫下叶片厚度均减少，且叶片厚度减少主要是由于海绵层厚度减少所致。100%光强对栅栏层厚度影响不显著，但海绵层厚度增加。BARI绿6号和BINA绿8号的产量在部分遮荫条件下保持稳定，而BINA绿5号和BINA绿4号的产量在部分遮荫条件下急剧下降。BARI Mung-6和BINA Mung-8在部分遮荫条件下比BINA Mung-5和BU Mug-4产量更高，叶片干重、荚果数-1、种子荚果数-1和籽粒重。农学家2017;15 (2) 40-51

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The Agriculturists

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