Evaluation of N2 fixation by nodulation-variants of chickpea in India

Rupela, O P and Sharma, L C and Danso, S K A (1998) Evaluation of N2 fixation by nodulation-variants of chickpea in India. Documentation. International Atomic Energy Agency, Vienna, Austria.

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Five nodulation-variants of chickpea (Cicer arietinum L.) cv. ICC 5003, delineated on the basis of visual ratings ('SI' for minimum nodulation to 'S51 for maximum), were used to investigate the optimum levels of nodulation and N2 fixation for growth and yield. Two field experiments were conducted, with fertilizer N (enriched in I5N) applied at 10 ('NT) or 100 kg ha"1 ('N2') on contrasting soils in different years; plants were evaluated for nodulation, growth, N2 fixation and yield. Experiment 2 included high-nodulating (HN) and low-nodulating (LN) selections of cw. ICC 4948, ICC 14196 and Kourinsky. Non-nodulating selections of chickpea were included as references to quantify N2 fixation. In both experiments the trends in amounts of N fixed by the five selections at Nl were similar when assessed by I5N-enriched and by N-difference methods. The percent N derived from N2 fixation (estimated from 15N data) correlated with yield and amount of N fixed in Experiment 2, but not Experiment 1. The relative nodulation differences were consistent across locations; the S4 and S5 (and HN) lines were generally superior to SI and S2 (and LN) for nodulation, N2-fixation, total dry matter and grain yield. Nodule number and mass correlated signficantly (P<0.05) with total dry matter, grain yield, total N and quantity of N2-fixed in both experiments

Item Type: Monograph (Documentation)
Subjects: Mandate crops > Chickpea
Depositing User: Ms K Syamalamba
Date Deposited: 01 May 2013 05:45
Last Modified: 01 May 2013 05:45
URI: http://oar.icrisat.org/id/eprint/6776
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