Posted at 06:20h
in
Crop disease
Dr.A.G.Rajalakshmi
16 views
मक्का में जस्ता की कमी और निगमन
Zinc is a micro-nutrient essential for the growth and development of plants, animals and humans. Zinc has several important functions in plants, including major roles in enzyme reactions, photosynthesis, DNA transcription and auxin activity.
Of all micro-nutrients, zinc is the most often deficient in corn production and most likely to elicit a yield response when applied as fertilizer. However, yield responses are only attainable when zinc is deficient and therefore limiting yield.
Role of Zinc in corn plant
Synthesis (production) of growth hormones and proteins.
Production of chlorophyll and carbohydrate metabolism.
Essential for the transportation of calcium throughout the corn plant.
Cell elongation, the increase in leaf and node size along with grain formation.
Factors Effecting Zinc Availability in soil
Soil pH above 7.0 causes zinc to form compounds that are unavailable to plants and results in more zinc deficiency symptoms.
Soils with low in organic matter have less zinc availability.
The temporary deficiency is caused by slow root growth. As the temperatures rise and conditions improve, deficiency symptoms should disappear.
Compacted soils reduce the corn plants rooting ability. The lack of roots, chance of intercepting zinc minerals is reduced and the corn plant is easily put into a zinc deficient state.
Phosphorus levels increase, the mycorhizae population decreases, thus reducing the plants ability to uptake...