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Influence of NPK fertilizers on early growth of RRII 400 series rubber clones in Tripura (Record no. 61275)

MARC details
000 -LEADER
fixed length control field	02101nam a2200229Ia 4500
100 ## - MAIN ENTRY--AUTHOR NAME
Personal name	Mandal Debasis
245 #0 - TITLE STATEMENT
Title	Influence of NPK fertilizers on early growth of RRII 400 series rubber clones in Tripura
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Name of publisher	Rubber Science
Year of publication	2013
300 ## - PHYSICAL DESCRIPTION
Number of Pages	83-94
520 ## - SUMMARY, ETC.
Summary, etc	Growth perfomance of high yielding RRII 400 series clones of rubber (Hevea brasiliensis)viz. RRII 417, RRII 429 and RRII 430 with RRIM 600 as the check clone, was studied during 2004-2011 under the agro-climatic conditions of Tripura. Influence of higher doses of NPK fertilizers on growth of these clones during immature phase of plantation was also investigated. At the end of the seventh year of planting, the clone RRII 429 registered highest girth (51.5 cm) followed by RRIM 600 (49.6cm) and the clone RRII 417 (47 cm) was the lowest. Highest tappability was observed for the clone RRII 429 (67.1;), while on other three clones it ranged from 47.7 to 60.1 per cent. The clone RRII 429 showed significant response towards application of NPK fertilizers. At the end of sixth year of planting, the RRII 429 registered a mean girth of 50.6cm and 73.3 per cent plants attained tappable girth when 150 per cent of reccommended NPK doses were applied. The other three clones required seven years or more to attain a mean girth of 50cm and 70 per cent tappability. The result showed that immaturity period of RRII 429 could be reduced by six months to one year by applying higher doses of NPK. Application of higher doses of NPK fertilizers in soils showed a significant improvement in organic carbon (OC) and available phosphorus, particularly in the surface layer; however a gradual decline in available potassium-balance was recorded in rubber soils indicating potassium vulnerability of soils under rubber in Tripura.
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Fertilizer dose
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Growth
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Rubber clones
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Soil Fertility
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Tappability
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	Tripura
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Datta Bhaskar
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Dey SK
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Pal TK
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type	Journals

Holdings
Withdrawn status	Lost status	Damaged status	Not for loan	Home library	Current library	Shelving location	Date acquired	Serial Enumeration / chronology	Koha item type
			Journals	RRII Library	RRII Library	Agronomy	26/07/2013	Volume 26, Issue 1	Journals