Effects of Zeolite Application and Nitrogen Fertilization on Yield Components of Cowpea (Vigna unguiculata L.)

Abstract

In order to examine the effect of zeolite application and nitrogen fertilization on yield and yield components of Cowpea, an experiment in factorial format based on randomized complete block design with three replications in Astaneh Ashrafiyeh Township (north of Iran) in 2011 was conducted. Factors of experiment was consist of two levels of zeolite (Z : without zeolite application and Z : zeolite application 5 t/ha) and six levels 12 of nitrogen fertilization (N : control (0 kg/ha pure nitrogen + without inoculation), N : 30 kg/ha pure nitrogen, 12 N : 60 kg/ha pure nitrogen,N : nitroxin inoculation, N : 15 kg/ha pure nitrogen + nitroxin inoculation, N : 30 kg/ha 3 4 5 6 pure nitrogen + nitroxin inoculation). In mature time, seed yield, number of pod per plant, number of seed per plant, plant height, pod length and 100 seed weight were measured. Results showed that, the effect of zeolite application and also nitrogen fertilization on all measured traits had significant differences in 1% probability level but interaction effect of zeolite and nitrogen fertilization only on seed yield and plant height showed significant differences in 5% probability level and on other studied traits was non significant. Among zeolite application treatments Z level with 835.8 kg/ha was recorded highest seed yield. Between nitrogen fertilization 2 levels the highest seed yield was obtained from N treatment. The maximum seed yield between interaction 3 levels was found from Z N treatment with 1224 kg/ha. 23