WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Monday, June 18, 2018

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Browse on keywords: legume nitrogen fixation Australia

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Search results on 06/18/18

3809. Ladd, J., J. Butler, and M. Amato. 1986. Nitrogen fixation by legumes and their role as sources of nitrogen for soil and crop.. Biol. Agr. Hort. 3:269-286.

10079. Cowie, A.L., R.S. Jessop, D.A. MacLeod and G.J. Davis. 1990. Effect of soil nitrate on the growth and nodulation of lupins (Lupinus angustifolius and L. albus).. Austral. J. Expt. Agric. 30:655-659..
The effect of increasing external nitrate concentration on the nodulation of Lupinus albus and L. angustifolius lines was examined in two sand culture experiments. In the first experiment four lines, three L. albus and one L. angustifolius, were grown at nitrate concentrations of 0, 2, 8, 16, and 30 mmol/L for 49 days. Increasing the nitrate concentration reduced nodule weight in all varieties to a similar extent. In a second experiment, 18 L. angustifolius lines were grown at nitrate concentrations of 2 and 8 mmol/L for 49 days. The ratio of nodule weights at the 8 and 2 mmol/L nitrate treatments varied widely, from 23 to 71%, between the lines. There appears to be potential for selection of L. angustifolius varieties able to maintain nitrogen fixation at increased levels of soil N.

10088. Cowie, A.L., R.S. Jessop and D.A. MacLeod. 1990. Effect of soil nitrate on the growth and nodulation of winter crop legumes.. Austral. J. Expt. Agric. 30:651-654..
The relative effect of increasing external nitrate supply on the nodulation of three winter crop legumes was examined in a controlled environment experiment. Lupin, chickpea and field pea were grown at two nitrate concentrations of 2 and 8 mmol/L for 40 days. Shoot and root growth were not affected by nitrate contrations. Increased nitrate concentrations significantly reduced nodule number and nodule weight in all species. The inhibition of nodulation by increased nitrate concentrations was greatest in peas, followed by chickpeas, and least in lupins.

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