AS  Vol.5 No.9 , July 2014
Role of Micronutrient in Rice Cultivation and Management Strategy in Organic Agriculture—A Reappraisal
Author(s) Shaon Kumar Das*
ABSTRACT

Micronutrient refers to the relative quantity of a nutrient that is required for plant growth. It takes part in metabolic activities, enzymatic process/catalysts etc. Thus these all directly and indirectly help in plant growth and development. There are 8 essential plant nutrient elements defined as micronutrients like boron (B), zinc (Zn), manganese (Mn), iron (Fe), copper (Cu), molybdenum (Mo), chlorine (Cl) and silicon (Si). They constitute in total less than 1% of the dry weight of most plants. Organic sources like farm yard manure, compost, vermicompost etc. may contain less quantity of these nutrients but presence of these help the plant in their growth and development. They also called trace elements or minor elements. They are required only in small amounts (5 to 200 ppm, or less than 0.02% dry weight). The visual symptoms may be caused by more than one nutrient. Deficiency of one nutrient may be related to an excess quantity of another. Nutrient deficiency symptoms are observed only after the crop has already suffered an irretrievable loss. When soil supplies more quantity of nutrient than the plant’s requirement, plant shows toxicity symptom.


Cite this paper
Das, S. (2014) Role of Micronutrient in Rice Cultivation and Management Strategy in Organic Agriculture—A Reappraisal. Agricultural Sciences, 5, 765-769. doi: 10.4236/as.2014.59080.
References
[1]   Rice Knowledge Management Portal.
http://www.rkmp.co.in/

[2]   International Rice Research Institute.
http://www.irri.org/?gclid=CInQ2LCuj7sCFSg B4god8WoA0Q

[3]   Introductory Soil Science, Dilip Kumar Das, Kanyani Publisher.

[4]   Zhu, Z., Wei, G., Li, J., Qian, Q. and Yu, J. (2004) Silicon Alleviates Salt Stress and Increases Antioxidant Enzymes Activity in Leaves of Salt-Stressed Cucumber (Cucumis sativus L.). Plant Science, 167, 527-533.
http://dx.doi.org/10.1016/j.plantsci.2004.04.020

[5]   Zu, C., Wu, H.S., Tan, L.H., Yu, H., Yang, J.F., Li, Z.G., et al. (2012) Analysis of Correlation between Soil pH and Nutrient Concentrations across Hainan Black Pepper Advantage Region. Chinese Journal of Tropical Crops, 33, 1174-1179.

[6]   Chaudhary, F.M. and Wallance, A. (1976) Zinc Uptake by Rice as Affected by Iron and a Chaletor of Ferrous Iron. Plant and Soil, 45, 697-700.
http://dx.doi.org/10.1007/BF00010591

[7]   Johnson, S.E., Lauren, J.G., Welch, R.M. and Duxbury, J.M. (2005) A Comparison of the Effects of Micronutrients Seed Priming and Soil Fertilization on the Mineral Nutrition of Chickpea (Cicer arietinum), Lentil (Lens culinaris), Rice (Oryza sativa) and Wheat (Triticum aestivum) in Nepal. Experimental Agriculture, 41, 427-448.
http://dx.doi.org/10.1017/S0014479705002851

[8]   Rafique, E., Rashid, A., Bhatti, A.U., Rasool, G. and Bughio, N. (2002) Boron Deficiency in Cotton in Calcareous Soil of Pakistan. In: Goldbach, H.E., et al., Eds., Distribution of B Availability and Comparison of Soil Testing Methods, Boron in Plant and Animal Nutrition, Kluwer Academic/Plenum Publisher, New York, 349-356.

[9]   Graham, R.D. and Welch, R.M. (2002) Plant Food Micronutrient Composition and Human Nutrition. Communication of Soil Science & Plant Analysis, 31, 1627-1640.
http://dx.doi.org/10.1080/00103620009370529

 
 
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