Grass-clover response to cattle slurry N-rates: Yield, clover proportion, protein concentration and estimated N2-fixation

Estimating legume N2 fixation in grass-clover mixtures of a grazed organic cropping system using two 15N methods

The input of Nitrogen (N) through symbiotic N2 fixation (SNF) in grass-clover mixtures was determined in an organic cropping system for grazing during 3 years. The mixture of perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.) was established by undersowing in spring barley (Hordeum vulgare L.) and maintained subsequently for two production years. Dinitrogen fixation w...

Evidence that P deficiency induces N feedback regulation of symbiotic N2 fixation in white clover (Trifolium repens L.).

Trifolium repens L. was grown to test the following hypotheses: when P is deficient (i) N2 fixation decreases as a result of the plant's adaptation to the low N demand, regulated by an N feedback mechanism, and (ii) the decrease in the photosynthetic capacity of the leaves does not limit N2 fixation. Severe P deficiency prevented nodulation or stopped nodule growth when the P deficiency occurre...

Subterranean Clover Response to Recombined Ag Grade and Superfine Limestone

Physiological and Morphological Responses of White Clover (Trifolium repens) and Red Clover (Trifolium pratense) Plants to Salinity Stress

Trifolium spp. are native plants in Iran exhibiting good ground cover po-tential. Salinity is a major environmental stress and today, 20% of the world cultivated areas and nearly half of all irrigated lands are affected by salinity. The main aim of this research was to study morphological and physiological adaptations of these native species under different salinity levels for urban landscape u...

Soybean N2 Fixation Estimates, Ureide Concentration, and Yield Responses to Drought

al., 1998) experiments have shown that N2 fixation in soybean is especially sensitive to water deficits and deIncreasing N2 fixation tolerance to drought has been hindered by creases before transpiration or photosynthesis. Furtherthe labor and costs of quantifying N2 fixation using 15N methodologies. The relative abundance of ureides (RAU) in plant tissues has been more, soybean grain yield und...