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On-farm evaluation of Hevea clones in humid sub-tropical Meghalaya with special reference to RRII 400 series clones. (Record no. 75344)

MARC details
000 -LEADER
fixed length control field	02234nam a22001937a 4500
100 ## - MAIN ENTRY--AUTHOR NAME
Personal name	Reju, M.J.
245 ## - TITLE STATEMENT
Title	On-farm evaluation of Hevea clones in humid sub-tropical Meghalaya with special reference to RRII 400 series clones.
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Name of publisher	Rubber Science, 37(1): 2024. 102-109.
520 ## - SUMMARY, ETC.
Summary, etc	Six clones viz. RRII 203, RRII 417, RRII 422, RRII 429, PB 235 and RRIM 600 were planted in 2009 at Mendipather, North Garo Hills, Meghalaya in block trials. All the clones except RRIM 600 attained tappability in seven years. The trees were opened for tapping in 2016 under S/2 d2 6d/7 tapping system. The highest tappability was recorded in RRII 429 (94%) followed by RRII 203 (88%), RRII 417 (86%), RRII 422 (83%), PB 235 (82%) and RRIM 600 (66%). Rubber yield over eight years showed the highest value for RRII 429 (52.9 g t-1 t-1) followed by RRII 422 (43.3 g t-1 t-1), RRII 417 (42.4 g t-1 t-1), PB 235 (37.2 g t-1 t-1), RRIM 600 (34.5 g t-1 t-1) and RRII 203 (34.2 g t-1 t-1). The estimated yield in terms of kilogram per hectare per year showed about 2500 kg for RRII 429 and over 2000 kg each for RRII 417 and RRII 422. The estimated yield was over 1700 kg for PB 235 and about 1600 kg each for RRII 203 and RRIM 600. The highest timber volume was recorded in PB 235 (0.19 m3) followed by RRII 203 (0.18 m3), RRII 417 (0.16 m3), RRII 429 (0.14 m3), RRII 422 (0.12 m3) and RRIM 600 (0.09 m3). The tree biomass growth was estimated for the above ground biomass (AGB) of the clones. The highest value was recorded for RRII 203 (395 kg tree-1) and the lowest in RRIM 600 (288 kg tree-1). Carbon stock and carbon sequestration potential of the clones showed the highest value for RRII 203 followed by RRII 429, PB 235, RRII 417, RRII 422 and RRIM 600. In the present study RRII 429 and RRII 417 showed superior performance to RRIM 600 for all the growth and yield parameters studied. Clones RRII 203 and PB 235 showed superiority in terms of all growth parameters over RRIM 600 with comparable yield performance.
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Biomass
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Block trial
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Carbon sequestration
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Girth
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	On-farm trial
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Timber
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Yield
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Chandra, U.
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type	Journals

Holdings
Withdrawn status	Lost status	Damaged status	Not for loan	Home library	Current library	Date acquired	Koha item type
				RRII Library	RRII Library	03/09/2024	Journals