Evaluation of the interactions of sowing date, fertility, shoot fly protection level and cultivar in rabi sorghum

Elbashir, E A H E A (1997) Evaluation of the interactions of sowing date, fertility, shoot fly protection level and cultivar in rabi sorghum. PHD thesis, Acharya NG Ranga Agricultural University.

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Supervisors

Supervisors Name	Supervisors ID
Bhaskar Reddy, B	ANGRAU
Bidinger, F R	ICRISAT

Abstract

The direct and interaction effects of planting date, fertility, shoot fly (Atherigona soccata) control and cultivar on growth and development, resource use efficiency, grain, fodder, and biomass yields in sorghum were investigated at ICRISAT during rabi 1995 and 1996 at deep and shallow vertisol sites. The study indicated that the interactions of sowing date x genotype, fertility x genotype and protection x genotype were important considerations for increased rabi sorghum productivity. This was true since the three genotypes had different response across management treatments in that differences in leaf area index, total dry weight, resource use and use efficiency as well as yield and yield components in M35-1 and Swathi were small at early and normal planting, but these parameters were significantly enhanced in IC94004 when it was sown early. On the otherhand, yield and yield components in IC94004 and M35-1 significantly responded to increased fertility levels (to F3) than in Swathi (to F2). The response of genotypes to protection when normally sown was significantly greater in IC94004 than either genotypes, indicating that when sowing was delayed to normal, protection was necessary in IC94004, but not necessarily so with M35-1 or Swathi. The path coefficient analysis indicated that rabi sorghum grain yield was highly correlated to the direct effect of total N uptake,total WUE, panicle number per unit area, grain number per panicle and harvest index. The direct effect of cumulative radiation accumulation and evapotranspiration on rabi sorghum grain yield was not strong

Item Type:	Thesis (PHD)
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Mandate crops > Sorghum
Depositing User:	Mr B K Murthy
Date Deposited:	19 Aug 2011 05:52
Last Modified:	19 Aug 2011 05:53
URI:	http://oar.icrisat.org/id/eprint/312
Acknowledgement:	It gives me great honour to extend words of gratitude and thanks to those who participated directly or indirectly towards the completion of the dissertation. The list is long, but to mention. Professor B. Bhaskar Reddy, Head (IIC), Department of Agronomy, College of Agriculture, Hyderabad (ANGRAU) and Chairman of llie advisory com~nitteea nd Dr. F.R. Bidinger. Princ~pal Scientist (Physiology), ICRISAT Asia Centcr (IAC) and Co-chairman of tlic adbisory conmilttec fur their correction, valuable suggestions and continuous encouragement. The members of the advisory colnlnittee Dr. V. Satyanarayana, Associate Professor. Department of Agronomy (ANGRAU) and Dr. I,. M. Rao, Associate Professor, Department of Physiology (ANGRAU) deserve special thanks to their cooperation and valuable comments. 'Thanks to Dr. Y.1,. Nene, former Deputy Director General (IAC); Dr. D E. Byth. former Associate Director General (Research) (IAC) Dr. tl. Melak Mengesha, fornicr Principal Scientist (Gemiplasm) and Program Leader (IAC) and Dr. B. Diwakar, Acting Prograni Leader, Training arid Fellowship Program (IAC) for securing the Scliolarsliip and tlieir contact with the Indian Council for Agricultural Research (ICAR) towards timely co~npletlon of formalilies. Deep gratitude is extended to Mr. L. Molian Reddy (senior research associate I). Mr. D.V Chandra Mohan Rao (Technical Assistant), Mr. B. Shivaiah and Mr. L. George (Field Heipera) (IAC) for thc~mr anagement and tcchnlcal help during the conduct ofthe experiment. 'Thanks to International Crops Icesearch Institute for the Semi-Arld Tropics (ICRISAT) [or tlie generous sponsoring ofthis work. I am deeply indebted to tlie tolernnce 2nd encouragelnelit of niy nife Anlira and my kids Rloha~uluada nd Reini: it bas all irispiratio~it oi\ords the co~npletioo~fit his aork.
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