Effects of defoliation on yield and reproduction of the dwarf shrub Indigofera spinosa
Identifieur interne : 002488 ( Main/Exploration ); précédent : 002487; suivant : 002489Effects of defoliation on yield and reproduction of the dwarf shrub Indigofera spinosa
Auteurs : George A. Keya [Kenya]Source :
- Acta Oecologica [ 1146-609X ] ; 1997.
English descriptors
- KwdEn :
Abstract
Abstract: Indigofera spinosa (Forsk.) is a key forage resource in the arid rangelands of northern Kenya inhabited by nomadic pastoralists. Because it is highly relished by livestock, it is subjected to heavy periodic and in some areas permanent browsing impact wherever it occurs. This study evaluated the effects of simulated herbivory on yield and reproduction of this species. Different levels of impact (light, moderate, moderately-heavy and heavy) were inflicted on individual shrubs at fortnightly and monthly intervals respectively. Results indicate that I. spinosa is highly resilient to browsing. Maximum regrowth compensation was achieved at the moderate level of impact. Heavy clipping reduced residual mass to an extend whereby the ability to compensate for lost vegetative organs was severely curtailed. A longer clipping interval tended to enhance regrowth, especially at the moderate intensity. Reproduction was significantly reduced by clipping impact. At the heavy clipping impact, reproduction was completely halted. Irrigation mitigated the impact of clipping by increasing the amount of regrowth and reproductive activity. To optimise the production and utilisation of I. spinosa pastures during the growing (wet) seasons, it is recommended that grazing should be moderate to leave browse height of 10–15 cm. At this intensity, adequate reproduction will be stimulated while ensuring availability of residual mass critical for dry season feeding and long term sustainable production. Yield to browsers will also be optimised at this level of impact.
Url:
DOI: 10.1016/S1146-609X(97)80034-3
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001874
- to stream Istex, to step Curation: 001758
- to stream Istex, to step Checkpoint: 000F60
- to stream Main, to step Merge: 002923
- to stream Main, to step Curation: 002488
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Effects of defoliation on yield and reproduction of the dwarf shrub Indigofera spinosa</title><author><name sortKey="Keya, George A" sort="Keya, George A" uniqKey="Keya G" first="George A." last="Keya">George A. Keya</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:93766B3122F37DA3C280ABE26B41AC8EDA1E3DBA</idno><date when="1997" year="1997">1997</date><idno type="doi">10.1016/S1146-609X(97)80034-3</idno><idno type="url">https://api.istex.fr/document/93766B3122F37DA3C280ABE26B41AC8EDA1E3DBA/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001874</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001874</idno><idno type="wicri:Area/Istex/Curation">001758</idno><idno type="wicri:Area/Istex/Checkpoint">000F60</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000F60</idno><idno type="wicri:doubleKey">1146-609X:1997:Keya G:effects:of:defoliation</idno><idno type="wicri:Area/Main/Merge">002923</idno><idno type="wicri:Area/Main/Curation">002488</idno><idno type="wicri:Area/Main/Exploration">002488</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Effects of defoliation on yield and reproduction of the dwarf shrub Indigofera spinosa</title><author><name sortKey="Keya, George A" sort="Keya, George A" uniqKey="Keya G" first="George A." last="Keya">George A. Keya</name><affiliation wicri:level="1"><country xml:lang="fr">Kenya</country><wicri:regionArea>National Arid Lands Research Centre, PO Box 147, Marsabit</wicri:regionArea><wicri:noRegion>Marsabit</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Acta Oecologica</title><title level="j" type="abbrev">ACTOEC</title><idno type="ISSN">1146-609X</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1997">1997</date><biblScope unit="volume">18</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="449">449</biblScope><biblScope unit="page" to="463">463</biblScope></imprint><idno type="ISSN">1146-609X</idno></series><idno type="istex">93766B3122F37DA3C280ABE26B41AC8EDA1E3DBA</idno><idno type="DOI">10.1016/S1146-609X(97)80034-3</idno><idno type="PII">S1146-609X(97)80034-3</idno><idno type="ArticleID">97800343</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1146-609X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Indigofera spinosa</term><term>Marsabit</term><term>Rendille</term><term>defoliation</term><term>northern Kenya</term><term>pastoralists</term><term>reproduction</term><term>yield</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Abstract: Indigofera spinosa (Forsk.) is a key forage resource in the arid rangelands of northern Kenya inhabited by nomadic pastoralists. Because it is highly relished by livestock, it is subjected to heavy periodic and in some areas permanent browsing impact wherever it occurs. This study evaluated the effects of simulated herbivory on yield and reproduction of this species. Different levels of impact (light, moderate, moderately-heavy and heavy) were inflicted on individual shrubs at fortnightly and monthly intervals respectively. Results indicate that I. spinosa is highly resilient to browsing. Maximum regrowth compensation was achieved at the moderate level of impact. Heavy clipping reduced residual mass to an extend whereby the ability to compensate for lost vegetative organs was severely curtailed. A longer clipping interval tended to enhance regrowth, especially at the moderate intensity. Reproduction was significantly reduced by clipping impact. At the heavy clipping impact, reproduction was completely halted. Irrigation mitigated the impact of clipping by increasing the amount of regrowth and reproductive activity. To optimise the production and utilisation of I. spinosa pastures during the growing (wet) seasons, it is recommended that grazing should be moderate to leave browse height of 10–15 cm. At this intensity, adequate reproduction will be stimulated while ensuring availability of residual mass critical for dry season feeding and long term sustainable production. Yield to browsers will also be optimised at this level of impact.</div></front></TEI><affiliations><list><country><li>Kenya</li></country></list><tree><country name="Kenya"><noRegion><name sortKey="Keya, George A" sort="Keya, George A" uniqKey="Keya G" first="George A." last="Keya">George A. Keya</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Rhénanie/explor/UnivTrevesV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002488 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 002488 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Rhénanie
|area= UnivTrevesV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:93766B3122F37DA3C280ABE26B41AC8EDA1E3DBA
|texte= Effects of defoliation on yield and reproduction of the dwarf shrub Indigofera spinosa
}}
| This area was generated with Dilib version V0.6.31. |  |