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Accueil du site → Doctorat → Inde → 2004 → Osmotic adjustment and assimilate Charbohydrate Partitioning in chickpea genotypes under soil moisture stress

Chhatrapati Sahuji Maharaj University (2004)

Osmotic adjustment and assimilate Charbohydrate Partitioning in chickpea genotypes under soil moisture stress

Chauhan , Shailendra Singh .

Titre : Osmotic adjustment and assimilate Charbohydrate Partitioning in chickpea genotypes under soil moisture stress

Auteur : Chauhan , Shailendra Singh .

Université de soutenance : Chhatrapati Sahuji Maharaj University

Grade : Doctor of Philosophy (PhD) 2004

Sommaire partiel
In India, chickpea (Cicer arietinum L.) is an imp(?rtant cool season grain legume chiefly grown in marginal lands. Besides being an important source of protein, in crop rotation, it also serves as a disease break cycle for continuous cereal cropping, helps in improving physical, chemical and biological properties of soil and thus plays an important role in sustaining soil productivity. The Rhizobium bacteria harbouring the nodule directly fix the atmospheric nitrogen, thus enriching the soil and eliminating the deficiency of nitrogen. In developing country like India, the ever increasing demand for cereal grains mitigates against the use of chickpea in better endowed agricultural lands and often relegates them to less favourable, usually rainfed environments. Like other grain legumes demand for chickpea is increasing but economics of production still do not encourage their cultivation on the more productive soils and under better resource management conditions. Many of the biotic and abiotic stresses faced by chickpea contribute to the large yield gap between potential yields and realized yields. Chickpeas are grown on 6.86 m ha with an average yield of 650-750 kg/ha. Since the area of chickpea is not likely to increase, therefore, it is essential to increase the yield through scientific approach in order to meet the dietary protein demand of the growing population.
In India, chickpea being a rabi season crop is chiefly grown as rainfed crop after cessation of monsoon rains from the preceding season. Being a cool season grain legume, it has to pass through two tiers of harsh conditions, one being low temperature while other, high temperature. Chickpea is particularly susceptible to low temperature, especially at flowering, and any advantage derived from early flowering is negated by increased flower and pod abortion. Osmotic adjustment in cliicq,ea uruferwater stress Summary As the crop is raised on conserved soil moisture, the growth and development of chickpea is dependent on a number of factors including amount of rainfall, soil type, and its water holding capacity, evapo-transpiration demand of the atmosphere, crop ideotype and population. The occurrence of terminal drought due to failure of winter rains coupled with high temperature and evaporative demand of the atmosphere at late podding phase affects the productivity of the crop severely leading to heavy loss of grain yield. The yield loss in chickpea varies from 30% to 60% depending on the geographic location and climatic conditions during the crop season. In rainfed agriculture, there seems to be very little option to increase realizable yields under water deficit conditions. Although, drought management has been an option to increase realizable yields, it is now increasingly being realized that the genetic improvement of drought tolerance is more rewarding. As irrigation sources become scarcer, development of genotypes with improved adaptation to drought is major goal in many crop-breeding programs.

Présentation et version intégrale (Shodhganga)

Page publiée le 16 février 2021