Grazing studies On the Guadalcanal Plains, Solomon Islands 2. Effects of pasture mixtures and stocking rate on animal production and pasture components

S.E.Watson S.E.WatsonS.E.Watson S.WatsonS. E.https://api.elsevier.com/content/author/author_id/57189680679 (1981) Grazing studies On the Guadalcanal Plains, Solomon Islands 2. Effects of pasture mixtures and stocking rate on animal production and pasture components. The Journal of Agricultural Science, 97 2: 353-364. doi:10.1017/S0021859600040788


Author S.E.Watson S.E.WatsonS.E.Watson S.WatsonS. E.https://api.elsevier.com/content/author/author_id/57189680679
Title Grazing studies On the Guadalcanal Plains, Solomon Islands 2. Effects of pasture mixtures and stocking rate on animal production and pasture components
Journal name The Journal of Agricultural Science   Check publisher's open access policy
ISSN 1469-5146
Publication date 1981-01-01
Sub-type Article (original research)
DOI 10.1017/S0021859600040788
Open Access Status
Volume 97
Issue 2
Start page 353
End page 364
Total pages 12
Language eng
Subject 1103 Animal Science and Zoology
1102 Agronomy and Crop Science
1311 Genetics
Abstract Animal production was compared on three pastures, Brachiaria mutica (para), B. decumbens (signal) and Panicum maximum cv. Hamil (hamil) each sown with a common legume mixture of Centrosema pubescens (centro), Macroptilium atropurpureum cv. Siratro, and Stylosanthes guianensis cv. Endeavour (stylo), at four stocking rates, 1-8, 2-7, 3-6, and 4-5 animals/ha, over 4 years on the Guadalcanal Plains, Solomon Islands. Mean live-weight gain per head over the four stocking rates and 4 years on para pastures was 0-47, on signal pastures 0-38, and on hamil pastures 2016-02-23 kg/head/day. Mean production per hectare at the optimum stocking rates were: para at 3-6 animals/ha, 607 kg; signal at 3-6 animals/ha, 442 kg; hamil at 2-7 animals/ha, 362 kg/ha/year. The high stocking rates of 3-6 and 4-5 animals/ha caused the hamil pastures to decline to the stage where they were destocked in the 4th year of grazing. Superior production on para pastures was not simply related to green dry matter (GDM) on offer. In the 1st year of grazing, GDM was highest in hamil pastures, but in the 2nd year highest in para, and in the 3rd year mean yields were similar in all pastures, but were very low at the 3-6 and 4-5 animals/ha stocking rate in the hamil pastures. Para pastures maintained highest legume contents. The quadratic relationship between live-weight gain/head and legume content was significant over all pastures and stocking rates. Live-weight gain (LWG) per head increased up to 15% legume content, after which there was little change. Yield of green leaf, percentage green leaf, and sward bulk density did not appear to be related to LWG/head. Para pastures had lower values for all these components than the other pastures. Chemical factors contributed to the higher animal production from para pastures. Para leaf maintained consistently higher in vitro dry-matter digestibility values. Na content of para averaged 0-12%, whereas other species were 0-01 to 0-02%, and below the critical level (0-05 %) for animal intake. N and S in leaf material, and Cu in total tops were also consistently higher in para grass. Results of this grazing trial suggest that selection of grass species on the basis of quality including dry-matter digestibility and mineral content, on ability to persist with increasing stocking rate, on compatibility with legumes, and on growth habit are more important than selection for dry-matter yield.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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Created: Tue, 11 Jul 2017, 00:05:23 EST by Web Cron