Abstract
U. R. Sangakkara 1*, G Pietsch, M. Gollner and B. Freyer Faculty of Agriculture, University of Peradeniya, Peradeniya 20400, Sri Lanka. Institute of Organic Agriculture, University of Natural Resources and Applied Sciences, Gregor Mendel Strasse 33, A-1180, Vienna, Austria. ABSTRACT A field experiment was conducted over a minor (dry) season to ascertain the impact of two organic materials (Gliricidia leaves and rice straw) applied as a surface mulch or incorporated into the root zone, on selected soil parameters, growth, nodulation and yields of mung bean (Vigna radiata L. R. Wilcz). The beneficial effects were compared to soils and the growth of the crop without organic matter. Organic matter, especially Gliricidia leaves, enhanced soil physical properties and plant nutrients (N, P and K) at the time of crop establishment and early growth. Incorporation had a greater beneficial impact, especially on physical properties of soil. While the organic materials increased germination, the method of addition had no significant impact. Growth of shoots, roots and nodulation were enhanced by incorporation of organic matter, again, the greater benefits were derived with Gliricidia leaves. Root growth measured in terms of root length densities was stimulated by organic matter incorporation. In contrast, surface application of the organic matter, especially rice straw, reduced weed growth. The benefits of the organic matter were also evident in seed yields and harvest indices, although incorporation did not increase seed yields to the same magnitude observed in vegetative growth or harvest indices and relative crop yields. The benefits of incorporating organic matter, especially material with low C: N ratios such as Gliricidia leaves in tropical smallholder organic systems are presented.
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Claims 8
Claim · model-written summary
Organic matter improved soil physical properties and nutrients at establishment.
- Taxon
- mung bean
.jpg?width=60)
Vigna radiatat0 - Treatment
- Organic mattere0
- Outcome
- soil physical properties and plant nutrients (N, P and K)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Organic matter, especially Gliricidia leaves, enhanced soil physical properties and plant nutrients (N, P and K) at the time of crop establishment and early growth”
t0“mung bean”
Claim · model-written summary
Incorporation had a greater benefit for soil properties.
- Taxon
- mung beanVigna radiatat0
- Treatment
- Incorporatione0
- Outcome
- physical properties of soile0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Incorporation had a greater beneficial impact, especially on physical properties of soil”
t0“mung bean”
Claim · model-written summary
Organic materials increased germination.
- Taxon
- mung beanVigna radiatat0
- Treatment
- organic materialse0
- Outcome
- germinatione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the organic materials increased germination”
t0“mung bean”
Claim · model-written summary
Addition method had no significant effect on germination.
- Taxon
- mungbeanVigna radiatat0
- Treatment
- method of additione0
- Outcome
- germinatione0
- Direction
- no significant impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the organic materials increased germination, the method of addition had no significant impact”
t0“yields of mungbean”
Claim · model-written summary
Organic matter incorporation enhanced shoots, roots and nodulation.
- Taxon
- mung beanVigna radiatat0
- Treatment
- incorporation of organic mattere0
- Outcome
- Growth of shoots, roots and nodulatione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of shoots, roots and nodulation were enhanced by incorporation of organic matter”
t0“mung bean”
Claim · model-written summary
Organic matter incorporation stimulated root length density.
- Taxon
- mung beanVigna radiatat0
- Treatment
- organic matter incorporatione0
- Outcome
- root length densitiese0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root growth measured in terms of root length densities was stimulated by organic matter incorporation”
t0“mung bean”
Claim · model-written summary
Surface application reduced weed growth, especially with rice straw.
- Taxon
- mung beanVigna radiatat0
- Treatment
- surface application of the organic mattere0
- Outcome
- weed growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“surface application of the organic matter, especially rice straw, reduced weed growth”
t0“mung bean”
Claim · model-written summary
Organic matter benefited seed yields and harvest indices.
- Taxon
- mung beanVigna radiatat0
- Treatment
- organic mattere0
- Outcome
- seed yields and harvest indicese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The benefits of the organic matter were also evident in seed yields and harvest indices”
t0“mung bean”
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