สืบค้นงานวิจัย
High Density Planting in Rubber Plantations
Annie Philip - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): High Density Planting in Rubber Plantations
ผู้แต่ง / หัวหน้าโครงการ (EN): Annie Philip
บทคัดย่อ (EN): In India 89 percent of the area under rubber cultivation is in the small holding sector, Small holder is attracted to high density planting to increase the productivity of his land. However, increasing planting density beyond an optimum may lead to poor growth and yield. An ideal density is one which gives enough above and below ground space for all the trees to grow without competition. Density determines the yield per tree and per unit area also. It also influences the planting and maintenance cost and tapping task. Hence planting density is an important parameter which influences the growth and yield of trees ad profitability. The present recommended planting density for rubber in India is 420-500 trees/ha. A field experiment was initiated at Central Experiment Station. Chethackal during 1994 with clone RRII 105 in split plot design with five densities as main plot treatment and two fertilizer quantities as sub plot treatment replicated four times to study the effect of density of planting on growth and yield of rubber. The five densities in the main plot comprises 420 trees/ha (4.9m x 4.9m), 479 trees/ha (4.6m x 4.6m), 549 trees/ha (4.3m x 4.3m), 638 trees/ha (4m x 4m), and 749 trees/ha (3.7m x 3.7m) and the two subplot treatments are recommended dose of fertilizer (RDF) on unit area basis and RDF on per plant basis. The plot size ranged from 25 to 49 plants according to the density. Girth of plants at a height of 150 cm from bud union was recorded annually. Bark thickness and bole height were measured 18 years after planting. Tapping was initiated in 2003 adopting 1/2sd/3 system. The yield of individual trees was recorded at fortnightly intervals following cup coagulation method. It was observed that girth of plants was not significantly influenced by the different densities up to eight years after planting. However plants in the higher densities of 549 trees/ha and 638 trees/ha recorded higher girth that in other densities till the sixth year. In the later years plants in the lowest density of 420 tree/ha recorded highest girth and from 9th year onwards growth of plants in this lowest density was significantly hither than all other planting densities. Lowest girth was recorded in the highest density plots. It was also noticed that fertilizer treatments had no significant effect on growth of plants under different planting densities. Plants in the lowest density had significantly higher bark thickness among the various densities and it was comparable with that in the density at 549 trees/ha. In the first year of tapping per tree yield was not significantly influenced by the different densities. However in the subsequent years plants in the lowest density (420 tree/ha) recorded significantly higher per tree yield (g/t/t) than all other densities. The annual yield per hectare showed a different trend. It increased with the planting density. The seven year yield data showed that in four years it was significantly higher in the highest density and it was comparable with that of the density 549 trees/ha. In the remaining three years it was highest in the density 549 trees/ha. It was also observed that the yield was not affected by the fertilizer treatments. The mean yield of seven years was also highest in the highest density and it was on per with that of 549 tree/ha. Bole height increased with increase in planting density. It was significantly higher in the highest density. Bole height of trees in other four lower planting densities were comparable. However it was observed that bole volume (18 year after planting) was not significantly influenced by the different densities. Net income. Considering the cost of cultivation and tapping and income from latex yield of 7 years and timber yield (18th year) was highest for the density of 549 trees/ha. Increasing planting density significantly retarded the growth of rubber and reduced the per tree yield. Bole volume was not affected by the planting density. The yield per unit area was increased with the planting density and the optimum planting density of clone RRII 105 was 549 trees/ha.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เผยแพร่โดย (EN): การยางแห่งประเทศไทย
คำสำคัญ (EN): high density planting
เจ้าของลิขสิทธิ์ (EN): การยางแห่งประเทศไทย
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Annie Philip. "High Density Planting in Rubber Plantations". ไม่ระบุหน่วยงาน. ม.ป.ป.

Annie Philip. "High Density Planting in Rubber Plantations". ไม่ระบุหน่วยงาน. ม.ป.ป.. Print.



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High Density Planting in Rubber Plantations
Annie Philip
การยางแห่งประเทศไทย
ไม่ระบุวันที่เผยแพร่
Carbon and Nutrients stock in mature rubber plantations with and without control of under flora Expansion of rubber plantations as an environment factor to increase malaria risk at the Thai borders High Density Planting – An Option for Higher Productivity of Rubber in North Eastern Region of India Labour used in rubber plantations and labour movement in rural, sub-urban and urban communities: A case study in Songkhla Province, Southern Thailand Using Geographic Information System (GIS) to investigate Natural Rubber Yield (Hevea brasiliensis) in Conjunction with Soil Fertility: a Case Study from Cam My Rubber Plantation, South-Eastern of Viet POTENTIAL OF INCREASING THE PLANTING DENSITY OF RUBBER IN SRI LANKA Effect of Temperature Constraints on Photosynthesis of Rubber (Hevea brasiliensis) Environmental Factors Associated with Buildup of High Density Aedes Albopictus Vector of Chikunguniya Virus in Rubber Plantations DISEASES OF RUBBER (Hevea brasiliensis) IN THE PHILIPPINES, CONTROL AND SCREENING FOR RESISTANCE Rubber Particles Proteins and Sensitivity to the Tapping Panel Dryness at Hevea brasiliensis
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