validation of ceres-maize model for hybrid maize under varied nitrogen levels and plant densities n

118 Pages·2016·4.74 MB·English

VALIDATION OF CERES-MAIZE
MODEL FOR HYBRID MAIZE
UNDER VARIED NITROGEN
LEVELS AND PLANT DENSITIES

N. MAHESH
B.Sc. (Ag.)

MASTER OF SCIENCE IN AGRICULTURE
(AGRONOMY)

2014
VALIDATION OF CERES-MAIZE MODEL
FOR HYBRID MAIZE UNDER VARIED
NITROGEN LEVELS AND PLANT
DENSITIES

By
N.MAHESH
B.Sc (Ag.)

THESIS SUBMITTED TO THE
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY
IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR
THE AWARD OF THE DEGREE OF

MASTER OF SCIENCE IN AGRICULTURE
(AGRONOMY)

CHAIRPERSON: Dr. P. LEELA RANI

DEPARTMENT OF AGRONOMY
COLLEGE OF AGRICULTURE
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY
RAJENDRANAGAR, HYDERABAD – 500 030.

2014
CERTIFICATE

Mr. N. MAHESH has satisfactorily prosecuted the course of research and that
thesis entitled “VALIDATION OF CERES-MAIZE MODEL FOR HYBRID
MAIZE UNDER VARIED NITROGEN LEVELS AND PLANT DENSITIES"
submitted, is the result of original research work and is of sufficiently high standard to
warrant its presentation to the examination. I also certify that neither the thesis nor its
part there of has been previously submitted by him for a degree of any University.

Date : (Dr. P. LEELA RANI)
Chairperson
CERTIFICATE

This is to certify that the thesis entitled “VALIDATION OF CERES-MAIZE
MODEL FOR HYBRID MAIZE UNDER VARIED NITROGEN LEVELS AND
PLANT DENSITIES" submitted in partial fulfillment of the requirements for the
degree of ‘Master of Science in Agriculture’ of the Acharya N. G. Ranga Agricultural
University, Hyderabad is a record of the bonafide original research work carried out by
Mr. N. MAHESH under our guidance and supervision.
No part of the thesis has been submitted by the student for any other degree or
diploma. The published part and all assistance and help received during the course of
the investigations have been duly acknowledged by the author of the thesis.

Chairman
Advisory Committee
Thesis approved by the Student’s Advisory Committee

Chairman : Dr. P. LEELA RANI
Senior Scientist (Agronomy),
AICRP on weed control,
Diamond Jublee Block, _________________
Rajendranagar, Hyderabad-500 030.

Member : Dr. G. SREENIVAS
Principal Scientist (Agronomy),
Agro Climate Research Centre,
_________________
Agricultural Research Institute,
Rajendranagar, Hyderabad-500 030

Member : Dr. A. MADHAVI
Senior Scientist (Soil Science),
Radio Tracer Laboratory (RTL),
_________________
Agricultural Research Institute,
Rajendranagar, Hyderabad-500 030

Date of final viva-voce:
DECLARATION

I, N. MAHESH, hereby declare that the thesis entitled “VALIDATION OF
CERES-MAIZE MODEL FOR HYBRID MAIZE UNDER VARIED NITROGEN
LEVELS AND PLANT DENSITIES" submitted to the Acharya N. G. Ranga
Agricultural University for the degree of Master of Science in Agriculture is the
result of original research work done by me. I also declare that no material contained
in the thesis has been published earlier in any manner.

Place : (N. MAHESH)
I.D. No. RAM/2012-04
Date :
ACKNOWLEDGEMENTS

I deem it as a great pleasure to express my heart felt gratitude and respect to the chairman of
my advisory committee, Dr. P. Leela Rani, Senior Scientist (Agronomy), AICRP on weed control,
Rajendranagar, Hyderabad, Her meticulous guidance, untiring interest and well timed suggestions
right from the initial stages till the completion of my research work, are unparalleled. I am indeed
greatly indebted for the affectionate encouragement and cooperation received from her.
I wish to proper my genuine thanks to, Dr. G.Sreenivas, Principal Scientist (Agronomy),
Agroclimate Research Centre, Agricultural Research Institute, Rajendranagar, Hyderabad and
member of my advisory committee for his benign help and transcendent suggestions during the course
of investigation and for critical perusal of manuscript.
I am extremely grateful to Dr. A. Madhavi, Senior Scientist (Soil Science), Radio tracer
laboratory (RTL), Agricultural Research Institute, Rajendranagar, Hyderabad, and member of my
advisory committee for her pragmatic suggestions and valuable help extending during my research
work.
My heartfelt thanks to Dr. A. Srinivas, Professor & Head, Department of Agronomy,
College of Agriculture, Rajendranagar for his valuable help and providing all facilities for the
research work.
I sincerely extend my profound gratitude to Dr. G. E. CH. Vidya Sagar, Professor, Dr. K.B.
Sunitha Devi, Professor, Dr.M.Madhavi, Professor, Dr. K.P. Vani, Associate Professor, Dr. Y.
Shivalaxmi, Assistant Professor Dr. K. Bhanu Rekha, Assistant Professor, Laxman, A.O Dept. Of
Agronomy, College of Agriculture, Rajendranagar, Hyderabad for their support and encouragement
during the course of my study.
I allocate my highest respect and heartful regards from my inner core of heart to my ever
loved parents, Sri. Janardhan Reddy and Smt. vijaya, who have given me life and taught the
concepts of life and their dedicated efforts to educate me to this level. With boundless affection, I
owe an encompassing debt to most my beloved brother venkatesh for constant encouragement
throughout my career.
It is a pleasure to acknowledge the affection and inspiration rendered by my friends Tinku,
Gunnu, DK, Madhan, Naveen, Nagraju, Karna, Bharat, Suresh, Sridhar, Shiva, Venu, Rp, and Jp.
And my classmates, Thirupathi, Nagender, Narender, Naresha, Anil, Kishore, Byomkesh, Meena,
Partha, Pallavi, Vijayalaxmi, Divya, Swetha, Revathi and Afsha for their special upliftment
during my studies and worries; and juniors Ramakrishna, vijay, sai, kalyan and Mahesh in whose
cheerful company I have never felt my work as burden.
I express my heartfelt gratitude and thanks to my seniors Omprakash, Rajesh, Sreedhar,
Rajender, Natraj, Kiran, Shivaprasad, Madhusudhan, Madhukar, Chiranjeevi, Ravi, Bharath,
Gouse, Sudhakara, Siddappa, Shalini, Soumya, Nalini, Samatha, Spandana and Swrana, for their
valuable guidance and encouragement.
I am thankful to Osman, college farm, Sardarbi, Lavanya, Raju, Tony and Chandrakala and
other non teaching staff of the Department of Agronomy for their timely assistance and cooperation.
I express my immense and whole hearted thanks to all my near for their cooperation, help
during the course of study and research.
I humbly thank to authorities of Acharya N.G. Ranga Agricultural University for the
financial help in the form of stipend during my study period.

Nalla Mahesh
LIST OF CONTENTS

CHAPTER TITLE
PAGE NO.
NO.

I INTRODUCTION

II REVIEW OF LITERATURE

III MATERIAL AND METHODS

IV RESULTS AND DISCUSSION

V SUMMARY AND CONCLUSIONS

LITERATURE CITED

APPENDICES
LIST OF TABLES
Table Title Page
No. No.
3.1 Physico-chemical properties of the soil
3.2 Cropping history of experimental plot
4.1 Plant height (cm) of maize at different growth stages as
influenced by plant densities and nitrogen levels

4.2 Number of days to attain different phenophases of maize as
influenced by plant densities and nitrogen levels
4.3 Leaf Area Index (LAI) of maize at different growth stages as
influenced by plant densities and nitrogen levels
4.4 Dry matter production (g plant-1) of maize at different
phenophases as influenced by plant densities and nitrogen
levels
4.5 Dry matter (g plant-1) partitioning at maturity stage of maize
as influenced by plant densities and nitrogen levels
4.6 Yield attributes of maize as influenced by plant densities and
nitrogen levels
4.7 Grain yield, stover yield and Harvest index (HI) of maize as
influenced by plant densities and nitrogen levels
4.8 Nitrogen uptake (g plant-1) by maize at different growth
stages as influenced by plant densities and nitrogen levels
4.9 Gross returns, net returns and B:C ratio of maize as
influenced by plant densities and nitrogen levels
4.10 Intercepted PAR (%) of maize at different growth stages as
influenced by plant densities and nitrogen levels

4.11 Radiation use efficiency (RUE) (g MJ-1) of maize at different
growth stages as influenced by plant densities and nitrogen
levels

4.12 Correlation coefficients between growth parameters and
grain yield of maize
4.13 Correlation coefficients between yield attributes and grain
yield of maize
4.14 Genetic coefficients of Deklab Super 900M used for CERES-
Maize model

4.15 Comparison of simulated and observed days to attain silking
of maize under varied nitrogen levels and plant densities

4.16 Comparison of simulated and observed days to attain physiological
maturity of maize under varied nitrogen levels and plant densities

4.17 Statistical indices used in the validation of CERES-maize
model

4.18 Tukeys test (HSD) for mean grain yield (kg ha-1) of maize at
different levels of plant densities

4.19 Tukeys test (HSD) for mean grain yield (kg ha-1) of maize at
different levels of nitrogen