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Anand Agricultural University, Anand

Anand Agricultural University (AAU) was established in 2004 at Anand with the support of the Government of Gujarat, Act No.(Guj 5 of 2004) dated April 29, 2004. Caved out of the erstwhile Gujarat Agricultural University (GAU), the dream institution of Sardar Vallabhbhai Patel and Dr. K. M. Munshi, the AAU was set up to provide support to the farming community in three facets namely education, research and extension activities in Agriculture, Horticulture Engineering, product Processing and Home Science. At present there seven Colleges, seventeen Research Centers and six Extension Education Institute working in nine districts of Gujarat namely Ahmedabad, Anand, Dahod, Kheda, Panchmahal, Vadodara, Mahisagar, Botad and Chhotaudepur AAU's activities have expanded to span newer commodity sectors such as soil health card, bio-diesel, medicinal plants apart from the mandatory ones like rice, maize, tobacco, vegetable crops, fruit crops, forage crops, animal breeding, nutrition and dairy products etc. the core of AAU's operating philosophy however, continues to create the partnership between the rural people and committed academic as the basic for sustainable rural development. In pursuing its various programmes AAU's overall mission is to promote sustainable growth and economic independence in rural society. AAU aims to do this through education, research and extension education. Thus, AAU works towards the empowerment of the farmers.

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Subject: Agricultural Meteorology × Author: CHAUDHARI, G. B. × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    STUDIES ON SOME ASPECTS OF THERMAL AND RADIATION REGIMES ON GROWTH AND DEVELOPMENT OF TWO WHEAT SPECIES (Triticum aestivum, Linean and Triticum durum, Linean) AT ANAND
    (AAU, Anand, 1991) CHAUDHARI, G. B.; SAVANI, M. B.
    Thermal and radiation regimes are the most vital factors for influencing the plant responses for growth and development that govern the productivity of crops in the field. The most important weather variables influencing the plant growth and development are temperature, radiation and moisture. An experiment was planned and conducted in the year 1989-90 at Anand to assess the requirement of accumulated values of day and night hours thermal time, growing degree days (GDD), photothermal unit (PTU) and photosynthetically active radiation (PAR) for the completion of the different developmental phases and maturity of the wheat crop. The statistical analysis on the data of grain yield of the wheat crop revealed that the dates of sowing were significant and varieties and their interactions with the dates of sowing were found non-significant. The results of analysis of biomass showed high significant differences in dates of sowing, varieties as well as in their interactions wheat variety Raj-1555 (V2) produced higher grain yiela while variety Lok-1 (V1)produced higher biomass yield as compared to each other. The meteorological indices of thermal regime viz., day and night hours thermal time, GDD, PTU and prevailing period of the maximum temperature were negatively correlated with grain yield which revealed that as the value of accumulated thermal indices increases, the grain yield of wheat decreases. The relative performance of the various agrometerological indices representing the thermal regimes in explaining the growth behaviour of wheat crop at Anand was such that all the indices behaved more or less equally well in respect of their accumulated values at the maturity stage. However PAR and GDD had showed less variations in all the phases, than the variations observed in other meteorological indices. The variation in the accumulation of thermal indices decreases with the advancement of growing season towards maturity of the crop and hence the later stages of crop growth could be used more accurately for prediction of grain yield. High correlation (r = 0.96) between the values of PARM and RSM (Solar radiation) was observed. The values of average ratio between PARM and RSM was obtained as 0.41. The maximum dry matter production per unit absorption of PAR by canopy was observed in the milking stage of the crop growth in both the varieties.The average conversion efficiency was worked out on the basis of requirement of equivalent incident energy to produce one gram of biomass. The values were 0.80 and 0.69 per cent for varieties V1 and V2 respectively The photosynthetic efficiency was observed to be associated with the higher dry matter production. Crop growth analysis was carried out in terms of crop growth rate (CGR) based on number of days and growing degree days. The values of average crop growth rate (CGR) were observed as 9.15 and 7.97 gm m-2 day-1 for varieties V1 and V2 respectively. The CGR based on GDD, the values were obtained as 0.538 and 0.478 gmm-2 GDD-1 for varieties V1 and V2 respectively. On an average the highest crop growth rate was observed in the flowering stage of the crop growth for both the varieties V1 and V2.