Physiological Responses of Winged Bean [Psophocarpus Tetragonolobus (L.) Dc.] to Support Systems and Ratooning

Physiological Responses of Winged Bean [Psophocarpus Tetragonolobus (L.) Dc.] to Support Systems and Ratooning

Winged bean is an indeterminate, climbing, perennial legume that needs support to achieve high yields. The major constraint to large scale production of winged bean is the need for trellising which incurred an additional cost of production. After harvesting of young or mature pods plants can be c...

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Main Author: Rahman, Md. Motior
Format: Thesis
Language:English
English
Published: 1998
Subjects:
Beans
Psophocarpus tetragonolobus (L.) DC
Online Access:http://psasir.upm.edu.my/id/eprint/10416/1/FP_1998_6_A.pdf
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spelling my-upm-ir.104162011-04-27T05:24:33Z Physiological Responses of Winged Bean [Psophocarpus Tetragonolobus (L.) Dc.] to Support Systems and Ratooning 1998 Rahman, Md. Motior Winged bean is an indeterminate, climbing, perennial legume that needs support to achieve high yields. The major constraint to large scale production of winged bean is the need for trellising which incurred an additional cost of production. After harvesting of young or mature pods plants can be cut and the pollarded root stock produces a ratoon crop. Ratooning, a new technique for seed production of winged bean, can reduce the initial expenditure on support structures. Therefore, these studies on the effects of support systems and ratooning on growth and seed production of winged bean were conducted under humid tropical field conditions to document some experimental evidence. Results from the first experiment revealed that when compared to unsupported control, support height of 1 and 2 m caused a significant increase in leaf area index (LAI), net photosynthesis, relative growth rate (RGR), nodule activity, solar radiation interception (SRI), pattern of dry matter accumulation and partitioning and consequently the seed yield of winged bean. Plants grown on a support height of2 m had enhanced leaf growth, pod number and total dry matter yield when compared to those on support height of Im and unsupported plants. In the subsequent experiment, the root stock of the main crop was cut off at 126, 140, 154 and 168 days after germination (DAG) and the ratooned crops maintained for the next two crop cycles (126 days/crop cycle). The results suggested that ratooning of winged bean at 126 or 140 DAG would lower the investment expenditure on support structures and produced the highest cumulative seed yield per unit area per unit time. Beans Psophocarpus tetragonolobus (L.) DC 1998 Thesis http://psasir.upm.edu.my/id/eprint/10416/ http://psasir.upm.edu.my/id/eprint/10416/1/FP_1998_6_A.pdf application/pdf en public phd doctoral Universiti Putra Malaysia Beans Psophocarpus tetragonolobus (L.) DC Faculty of Agriculture English
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
English
topic Beans
Psophocarpus tetragonolobus (L.) DC
spellingShingle Beans
Psophocarpus tetragonolobus (L.) DC

Rahman, Md. Motior
Physiological Responses of Winged Bean [Psophocarpus Tetragonolobus (L.) Dc.] to Support Systems and Ratooning
description Winged bean is an indeterminate, climbing, perennial legume that needs support to achieve high yields. The major constraint to large scale production of winged bean is the need for trellising which incurred an additional cost of production. After harvesting of young or mature pods plants can be cut and the pollarded root stock produces a ratoon crop. Ratooning, a new technique for seed production of winged bean, can reduce the initial expenditure on support structures. Therefore, these studies on the effects of support systems and ratooning on growth and seed production of winged bean were conducted under humid tropical field conditions to document some experimental evidence. Results from the first experiment revealed that when compared to unsupported control, support height of 1 and 2 m caused a significant increase in leaf area index (LAI), net photosynthesis, relative growth rate (RGR), nodule activity, solar radiation interception (SRI), pattern of dry matter accumulation and partitioning and consequently the seed yield of winged bean. Plants grown on a support height of2 m had enhanced leaf growth, pod number and total dry matter yield when compared to those on support height of Im and unsupported plants. In the subsequent experiment, the root stock of the main crop was cut off at 126, 140, 154 and 168 days after germination (DAG) and the ratooned crops maintained for the next two crop cycles (126 days/crop cycle). The results suggested that ratooning of winged bean at 126 or 140 DAG would lower the investment expenditure on support structures and produced the highest cumulative seed yield per unit area per unit time.
format Thesis
qualification_name Doctor of Philosophy (PhD.)
qualification_level Doctorate
author Rahman, Md. Motior
author_facet Rahman, Md. Motior
author_sort Rahman, Md. Motior
title Physiological Responses of Winged Bean [Psophocarpus Tetragonolobus (L.) Dc.] to Support Systems and Ratooning
title_short Physiological Responses of Winged Bean [Psophocarpus Tetragonolobus (L.) Dc.] to Support Systems and Ratooning
title_full Physiological Responses of Winged Bean [Psophocarpus Tetragonolobus (L.) Dc.] to Support Systems and Ratooning
title_fullStr Physiological Responses of Winged Bean [Psophocarpus Tetragonolobus (L.) Dc.] to Support Systems and Ratooning
title_full_unstemmed Physiological Responses of Winged Bean [Psophocarpus Tetragonolobus (L.) Dc.] to Support Systems and Ratooning
title_sort physiological responses of winged bean [psophocarpus tetragonolobus (l.) dc.] to support systems and ratooning
granting_institution Universiti Putra Malaysia
granting_department Faculty of Agriculture
publishDate 1998
url http://psasir.upm.edu.my/id/eprint/10416/1/FP_1998_6_A.pdf
_version_ 1747811116969361408

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