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INFLUENCE OF HARVEST RESIDUE MANAGEMENT, WEED CONTROL, LEGUME COVER CROPPING AND SOIL TRENCHING ON EUCALYPTUS PRODUCTIVITY IN KERALA, INDIA

K. V. Sankaran, K. C. Chacko, R. C. Pandalai, M. Balasundaran, T. S. Grove, D. S. Mendham and A. M. O'Connell
Journal of Tropical Forest Science
Vol. 16, No. 2 (April 2004), pp. 232-247
Stable URL: http://www.jstor.org/stable/23616516
Page Count: 16
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
INFLUENCE OF HARVEST RESIDUE MANAGEMENT, WEED CONTROL, LEGUME COVER CROPPING AND SOIL TRENCHING ON EUCALYPTUS PRODUCTIVITY IN KERALA, INDIA
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Abstract

The impact of harvest residue management, weed control, cover cropping with legumes and soil trenching on productivity of Eucalyptus tereticornis and E. grandis was examined for three years after establishment of four plantations in Kerala, India. Four sites were examined in this study, two each with E. tereticornis and E. grandis, representing a wide range in climate and fertility. Harvest residue management had no effect on plantation productivity in the short term of this study. Complete weeding enhanced plantation productivity of E. tereticornis at three years, with volume increases of up to 141% compared with spot-weeded treatments. Strip weeding (1 m strips along the tree rows) did not improve productivity compared with spot-weeded treatments. Effects of legume intercropping on the growth of E. tereticornis was tested using three legume species, namely, Pueraria phaseoloides, Stylosanthes hamata and Mucuna bracteata. Legume cover-cropping had no effect on tree growth, suggesting that the legume cover crops had a lower competitive effect compared with weeds. Soil trenching also had no short-term effect on plantation productivity of E. grandis and E. tereticornis. Pengaruh pengurusan sisa tuai, kawalan rumpai, penanaman legum penutup dan peparitan tanih terhadap produktiviti Eucalyptus tereticornis dan E. grandis dikaji selama tiga tahun selepas ditanam di empat ladang di Kerala, India. Empat tapak dikaji, iaitu dua tapak E. tereticornis dan dua tapak E. grandis. Kesemuanya mewakili julat iklim dan kesuburan yang luas. Pengurusan sisa tuai tidak mempunyai kesan pada produktiviti ladang sepanjang tempoh kajian yang singkat ini. Setelah tiga tahun, perumpaian lengkap meningkatkan produktiviti ladang E. tereticornis, dengan peningkatan isi padu sebanyak 141% berbanding rawatan perumpaian setempat. Perumpaian jalur (jalur 1 m sepanjang barisan pokok) tidak meningkatkan produktiviti pokok berbanding rawatan perumpaian setempat. Kesan penanaman selingan pokok legum terhadap pertumbuhan E. tereticornis diuji menggunakan tiga spesies legum iaitu Pueraria phaseoloides, Stylosanthes hamata dan Mucuna bracteata. Penanaman legum penutup tidak memberi kesan terhadap pertumbuhan pokok. Ini menunjukkan tanaman legum penutup mempunyai kesan saingan yang lebih rendah berbanding rumpai. Peparitan tanih juga tidak mempunyai kesan jangka pendek terhadap produktiviti ladang E. tereticornis dan E. grandis.

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