الفهرس 
1. INTRODUCTIONOnly 14 pages are availabe for public view
 |  | from | 145 |  |  |
| | | from | 145 | | |
Abstract
Abstract of Ph.D. Thesis entitled The effect of some cultural treatments on potato grown in
new reclaimed land in El-Sadat region
Full name: Nahla Mokhtar Fetouh Morsy
Two field experiments were carried out on potato plants, Solanum
tuberosum L., cv. Sponta, at the Experimental Farm of the Environmental
Studies and Research Institute in El-Sadat city, Minufiya University, Egypt,
during the summer seasons of 2009 and 2010 in sandy loam soil. The
experimental treatments were arranged in a split-split plot design with 3
replicates. Studies aimed to investigate the effect of organic and mineral
nitrogen combination with or without biofertilizer inoculation and with or
without foliar application by yeast extract on growth, yield and quality of
potato. The treatments used were 150 kg mineral-N/fed. as ammonium nitrate,
100 kg mineral-N + 50 kg organic-N/fed., 75 kg mineral-N + 75 kg organic-
N/fed., 50 kg mineral-N + 100 kg organic-N/fed. and 150 kg/fed. organic-N as
chicken manure with or without biofertilizer ”N-free living bacteria
(Azotobacter and Azospirillium) and a phosphate dissolving bacteria (Bacillus
megatherium)” and with or without foliar application by yeast extract (50
ml/l).
Results show that using 75 kg mineral-N + 75 kg organic-N/fed.,
improved plant growth, yield and tubers quality than other organic-mineral N
combination. Also, inoculating tubers with biofertilizer gave good results than
when no biofertilizer was added. In addition, the treatments sprayed with yeast
extract gave good results (in most cases) as compared with untreated.
Therefore, using 75 Kg mineral-N + 75 Kg organic-N/fed. combined with
biofertilizer and spray with yeast extract gave the best growth and increased
total yield with the best tubers quality as compared with all other used
treatments. This increase reached 26.66 and 30.15 % as an average in both
seasons for total yield per plant and per feddan respectively, as compared with
plants supplied with 150 kg mineral-N without biofertilizer or spraying by
yeast extract (control).
Key words: organic and mineral N combination, chicken manure, yeast extract,
bifertilizer, potato tuber.