Abstract
A field experiment was conducted at the Waimanalo Research Station of the University of Hawaii, Honolulu, to study the effect of Nitrogen and intercropping on growth behaviour and N contents of sweet corn, during 1993-94. Sweet corn was planted as a sole and as intercrop in between sugarcane rows at N levels of 0, 75, ISO and 300 kg ha'1. The results of the study indicated that cropping system did not affect plant height and leaf area index. Increasing N levels increased plant height in both cropping systems. Plants were tallest at 300 kg N ha'1 and shortest in the control plots at various growth stages in both cropping systems. Similarly leaf area index, at the time of harvest, was maximum at 300 kg N ha'1 and minimum in the control plots in both cropping systems.
Total fresh weight of ears ha'1 was higher in the intercropped sweet corn. Fresh weight of ears per hectare increased with increasing N levels in both cropping systems. Application of 300 kg N ha'1 produced maximum tonnes of ears ha'1 (16.41 t ha'1 in sole sweet corn and 21.11 t ha'1 intercropped sweet corn). Average nitrogen concentration of sweet corn stems, leaves, husks and the total plant was not affected by cropping systems. N concentration in stems, husks, leaves and the whole plant increased with increasing N levels in both cropping systems. Stem and leaf N concentrations were significantly different between various N levels in both cropping systems. The highest N concentrations in stems, leaves, husks and whole plant were found in 300 kg N ha'1 and the lowest in the control plot treatment.
M. Akhtar , J.A. Silva. (1998) GROWTH BEHAVIOUR AND N CONTENTS OF SWEET CORN AFFECTED BY NITROGEN APPLICATION AND INTERCROPPING, The Journal Soil & Environment , Volume 15, Issue (3-4).
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