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Estimates of nitrogen fixation by legume cover crops grown in young rubber plantations using 15N isotope dilution technique (Record no. 58802)

MARC details
000 -LEADER
fixed length control field	02050nam a2200205Ia 4500
100 ## - MAIN ENTRY--AUTHOR NAME
Personal name	Prasannakumari P
245 #0 - TITLE STATEMENT
Title	Estimates of nitrogen fixation by legume cover crops grown in young rubber plantations using 15N isotope dilution technique
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Name of publisher	Journal of Plantation Crops
Year of publication	2014
300 ## - PHYSICAL DESCRIPTION
Number of Pages	205-209
520 ## - SUMMARY, ETC.
Summary, etc	15N Isotope dilution technique has been used to estimate the amounts of N2 fixed by leguminous cover crops, Pueraria phaseoloides and Mucuna bracteata grown in the inter-rows of immature rubber plantations, using Ipomoea batatas as the reference plant. The field experiment was conducted in the RRII farm during 2009, in an area planted with Hevea brasiliensis, clone RRII 105. The cover crops and the reference plant were established in separate blocks. For labeled urea application, micro-plots (Im x Im) were established and 15N labeled urea, 5 atom;15N excess, was applied @ 5kg ha-1. After 45 days, the above ground biomass from the micro-plots was harvested, weighed and sub-samples were collected for determination of dry matter accumulation, N content and 15N enrichment. Micro-plot experiments were conducted thrice during the active growth period of the legumes and the reference plant, i.e., during June-July, August-September and October-November. Estimates of N2-fixation for P. phaseoloides ranged from 79.82 kg N ha-1 during June-July to 39.32 kg N ha-1 during October-November and averaged 58.1 kg ha-1. Corresponding estimates for M. bracteata ranged from 83.95 kg N ha-1 during June-July to 57.03 kg N ha-1 during October-Nov and averaged 69.7 kg N ha-1. The study showed that both the cover crops fixed considerable quantities of atmospheric nitrogen and that N2 fixation by M. bracteata was higher than that of P. phaseoloides.
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	15N isotope dilution technique
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	M. bracteata
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	N2 fixation
650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical Term	P. phaseoloides
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Jessy M D
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Joseph M
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Philip A
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	26/09/2014	Volume 42, Issue 2	Journals