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Study of the Significance of Zinc Nutrition on Crop Productivity and Quality of Produce at Farmers' Fields in India
As a micronutrient, zinc (Zn) is involved in enzyme activation (about 300 enzymes), gene expression, phytohormone activity, protein synthesis, photosynthesis and carbohydrate metabolism, fertility and seed production, and disease resistance. Zinc is taken up by root - cell membrane transporters of the zinc iron premeases (ZIP) family in all plant species, as well as by yellow stripe - like (YSL) proteins (Zn - phytosiderophore complexes) in grasses, and is loaded into the stele via heavy metal ATPases (HMA). About half of the arable soils in the world have low zinc availability, resulting in hampered crop growth, poor yields, and low zinc density in edible crop parts. There are commercially available cultivars with increased effi ciency of zinc acquisition from soil as well as zinc utilization in tissues. Mechanisms underlying zinc effi ciency are not completely understood. Given that 2 - 3 billion people have diets defi cient in zinc, biofortifi cation of staple crops is one of the global challenges being tackled at present. Soil and foliar fertilization with zinc (agronomic biofortifi cation) as well as breeding genotypes for increased zinc density in edible parts (genetic biofortifi cation) are the options currently pursued for improving zinc intake in susceptible human populations.
Micro-nutrients in Agriculture-issues relating to quality control, raw material availability and demand supply situation with special reference to zinc sulphate
- M Motsara
Motsara, M.R (1999) Micro-nutrients in Agriculture-issues relating to quality control, raw
material availability and demand supply situation with special reference to zinc sulphate.
National Symposium on Zinc fertilizer Industry, Lucknow, April 24, 1999.
Micro-nutrient delineation and soil fertility mapping
- M V Singh
Singh, M.V.(1999) Micro-nutrient delineation and soil fertility mapping, National
Symposium on Zinc fertilizer Industry, Lucknow, April 24, 1999.
- C Quijano-Guerta
- G J D Kirk
- A M Portugal
- V I Bartolome
- G C Mc Laeren
Quijano-Guerta, C., Kirk, G.J.D., Portugal, A.M., Bartolome, V.I. and Mc Laeren, G.C.
(2002) Field crops research 76: 123-130.