Author: Abolghassem BehzadiPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 82
Book Description
The Effect of Sulfur on the Yield and Protein Content of Alfalfa (Medicago Sativa L.)
Author: Abolghassem BehzadiPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 82
Book Description
Effect of Sulfur on Dinitrogen Fixation of Alfalfa (Medicago Sativa L.)
Author: Gerardo Lopez-JuradoPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 330
Book Description
Field experiments were established in 1982 and 1983 on a Woodburn silt loam soil (Aquultic Argixeroll) to examine the effect of S fertilizer on dinitrogen fixation and dry matter yield of 10 week-old seedling alfalfa (Medicago sativa L. cv. 'Apollo'). Six levels of S fertilizer (0 to 67.2 kg S/ha) were applied as powdered gypsum. The experimental design was a split-block with one half of the seeds inoculated with commercial inoculum, and the other half non-inoculated. Inoculation effects were highly significant in both years, indicating that the indigenous population of Rhizobium meliloti at the experimental sites was ineffective in N2-fixation. Dry matter yields were higher in inoculated than in non-inoculated treatments. Inoculated plants also showed a significantly higher acetylene reduction rate, N concentration, and total tissue N and S. No significant differences in any of these parameters were detected for the different S treatments. Sulfur fertilization increased the S concentration of non-inoculated plants more than inoculated plants, and decreased the N:S ratio in the forage by increasing tissue S content. The highest value of N2-fixed by the inoculated plants was obtained from the 44.8 kg S/ha treatment. Greenhouse experiments were performed to evaluate the effect of varied nutrient solution concentrations of sulfate on the yield, nodulation, dinitrogen fixation, N and S concentrations, and partitioning of N and S into shoots and roots of six week-old alfalfa seedlings. Four levels of S (0, 1, 2.5, and 25 mg S/L) were applied in a randomized complete block design, with three replications. Seeds were inoculated with commercial inoculum, planted in plastic containers of acid-washed sand, and irrigated with nutrient solution for one minute, at 2 h intervals. The addition of 2.5 mg S/L to the nutrient solution resulted in the highest total dry matter, acetylene reduction rate, total N content, percent S recovery, and percent increase in N due to dinitrogen fixation. N:S ratios were 50% higher in shoots (16:1) than roots (9:1), with S fertilization decreasing the N:S ratios. Data from field and greenhouse experiments support the conclusion that S fertilization will increase seedling alfalfa yield when S levels in the plant are below 2.5 mg S/g (0.25%). In inoculated plants S fertilization increased both total N and S, demonstrating the importance of S in symbiotic N2-fixation and the quality of forage produced.
The Effects of Certain Fertilizer Treatments on the Growth, Yield, and Protein Content of Alfalfa (medicago Sativa)
Author: Milton AllenStudies on the Expression and Inheritance of Some Components of Nutritional Quality in Alfalfa (Medicago Sativa L.) Forage
Author: James Enos SumbergPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 230
Book Description
The Effect of Field Applications of Sulfur and Various Phosphatic Fertilizers on the Yield and Sulfur Content of Alfalfa
Author: Hudson Lester BoydPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 148
Book Description
Sulfur Assimilation and Abiotic Stress in Plants
Author: Nafees A. KhanPublisher: Springer Science & Business Media
ISBN: 3540763260
Category : Science
Languages : en
Pages : 373
Book Description
The assimilation of sulfur in higher plants and its reduction in metabolically important sulfur compounds are crucial factors determining plant growth and vigor and resistance to stresses. The present book discusses the aspects of sustainable crop production with sulfur, the importance of sulfur metabolites and sulfur metabolizing enzymes in abiotic stress management in plants. The book provides the most up-to-date reference on sulfur assimilation in plants.
Effects of Managements and Varieties on Yield and Quality of Alfalfa (Medicago Sativa L.) Forage
Author: James Enos SumbergPublisher:
ISBN:
Category : Alfalfa
Languages : en
Pages : 230
Book Description
Bibliography of Agriculture
Author: Sulphur in Plants
Author: Y.P. AbrolPublisher: Springer Science & Business Media
ISBN: 9401702896
Category : Science
Languages : en
Pages : 424
Book Description
Sulphur (S) plays a pivotal role in various plant growth and development processes being a constituent of sulphur-containing amino acids, cysteine and methionine, and other metabolites viz., glutathione and phytochelatins, co-factor of enzymes which contribute to stress repair and amelioration of heavy metal toxicity. Besides, a number of S-containing components are biologically active and, thus, a source for use as medicinal value. The basic global issue before the agricultural scientist and world community is to evolve cultivars and develop methodologies for efficient use of inputs to enhance agricultural productivity. This is particularly true of the developing countries which are going to see maximum rise in population with changing food demands and declining availability of land. Amongst the inputs, nutrients play a crucial role. The major requirement is for N, P and K followed by several micro-nutrients. In this context reports of world-wide S deficiency in the agricultural systems are relevant. The reasons are many. Broadly speaking reduction inS emission, use of S-free N, P and K fertilizers and higher biomass production contributed the maximum. Despite the need for sulphur as an essential plant nutrient and the substantial returns expected from its use, very little attention has been given to fill the gap between supply and demand of S.
Author: