S120 :
Thesis > Central Library of Shahrood University > Agricultural Engineering > MSc > 2008
Authors:
Abstarct: In order to study the effects of plant density, nitrogen source and planting pattern on yield
of grain corn cultivar Ksc301 (Toloe), an experiment carried out in 1385 at fields of
agricultural Research center of shahrood. The arrangement was split-split plot baxsed on
completely randomized blocks design whit four replications. The main plots were allocated
to three plant densities(70000,80000,90000 plant/ha), the sub plots include two source of
fertilizers (urea and ammonium sulfat) and sub-sub plots consisted of two planting
pattern(single row and twin row). For determining physiological growth indices sampling
did every 15 day and growth indices calculated with mathematical quadratics. At the end of
growth season, final harvest and analysis were did. In conclusion this experiment showed
that plant density affected grain yield, biological yield, plant height, height ear length and
diameter and stem diameter but number of row, kernel per row and harvest index. Grain
yield in 80000 and 90000 densities was at the same level and were better than 70000 density.
Differences between 80000 density with respect to 70000 density was 13%. In this
experiment, two sources of fertilizer can not affected any upper propertis. The results
showed planting method significantly affected the grain yield, number of kernels per row,
biological yield plant, height plant, first ear height, ear diameter and length and stem
diameter. Grain yield in twin rows was 8% upper than single row. Interaction between plant
density and planting method affect grain yield, biologic yield, plant height and ear height.
Affected some of treatment levels too. Leaf area index and crop growth rate affected with
plant density and Crop planting method. The highest NAR obtained from lowest level of
plant density and thus at twin row. RGR in 70000 density was slower, but twin row
compared to single row was better. Fertilizer source could not affected any indices. All
treatments could not effected harvest index....
Keywords:
#plant density #nitrogen source #planting pattern #grain corn Link
Keeping place: Central Library of Shahrood University
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Keeping place: Central Library of Shahrood University
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