Effect of irrigation on growth of immature rubber
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TextPublication details: Global Competitiveness of Indian Rubber Plantation Industry : Rubber Planters Conference, India 2002. (Eds. C. Kuruvilla Jacob). Rubber Research Institute of India, Kottayam, Kerala, pp.86-87.Subject(s): Summary: Rubber is grown as a rainfed crop in the traditional rubber growing belt and it usually takes seven years to reach tappable girth. However, like other crops, rubber also responds to irrigation and experimental findings showed that the immaturity period can be reduced by about six months to one year by irrigating the plant during summer months. The results from the field of a farmer, who irrigated his rubber plantation throughout the entire immaturity period are overviewd in this paper. Polybag plants of RRII 105 with 2-3 whorls were planted in an area of 2.3ha. during 1996. The field was irrigated from the first year. During the initial three years base irrigation using a hose was given. From the fourth year, irrigation given through springler system. Irrigation was restricted to summer months only (December-March). The growth performance of rubber was compared to that of a nearby unirrigated 1996 replanted RRII 105 and it was found that the plants in the irrigated plots attained an average girth of 52.5 cm as against 45cm in the unirrigated field during the seventh year of planting. It was also observed that the growth was more uniform in the irrigated field and on an average 70 per cent of the trees reached tappable girth whereas in the unirrigated field of only 30 per cent of the trees attained tappable girth. The results show that irrigation given during summer months enhanced the growth of rubber.
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Journals
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RRII Library Soils and agonomy | Journals |
Rubber is grown as a rainfed crop in the traditional rubber growing belt and it usually takes seven years to reach tappable girth. However, like other crops, rubber also responds to irrigation and experimental findings showed that the immaturity period can be reduced by about six months to one year by irrigating the plant during summer months. The results from the field of a farmer, who irrigated his rubber plantation throughout the entire immaturity period are overviewd in this paper. Polybag plants of RRII 105 with 2-3 whorls were planted in an area of 2.3ha. during 1996. The field was irrigated from the first year. During the initial three years base irrigation using a hose was given. From the fourth year, irrigation given through springler system. Irrigation was restricted to summer months only (December-March). The growth performance of rubber was compared to that of a nearby unirrigated 1996 replanted RRII 105 and it was found that the plants in the irrigated plots attained an average girth of 52.5 cm as against 45cm in the unirrigated field during the seventh year of planting. It was also observed that the growth was more uniform in the irrigated field and on an average 70 per cent of the trees reached tappable girth whereas in the unirrigated field of only 30 per cent of the trees attained tappable girth. The results show that irrigation given during summer months enhanced the growth of rubber.
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