Effect cattle manure and plant density on Morpho-physiological traits of sweet corn in second cultivation by different culture methods

ABSTRACT: In order to investigate the effect of different cattle manure levels and plant densities as well as comparing two culture methods on morphophysiological traits related to sweet corn, a split-factorial design was conducted as base of randomized complete block design with four replications at the research farm of Takestan, Iran, in 2009. Cattle manure rates were assigned to main plots at three levels (m1=0, m2= 25 and m3= 50 ton/ha) and plant density in two levels (d1= 75000, d2= 85000 plant/ha) with culture method in 2 levels (c1= on ridge and c2= on furrow) as sub plots were considered .The result showed that Cattle manure application significant effect on grain yield, biological yield, harvest index, green ear yield and seed length (p < 0.01) and increased the traits with the increased use of cattle manure. also The results indicated that plant density had significant effect on grain yield and biological yield and increased grain yield and biological yield with the increased plant density and also Seed sowing on the furrow caused an increase in harvest index. Interaction effect of plant density × cattle manure to a highly level (p < 0.01) and cattle manure× culture method and also plant density ×culture method to a lowly level (p < 0.05) affected biological yield. harvest index and grain yield were affected to a highly level via triple interaction of cattle manure ×plant density ×culture method (p < 0.01).