Abstract
The purpose of this research is to investigate the productivity of land by N,P,K fertilizer and time of planting peanuts in intercropping systems with maize. This research was conducted applying experimental garden at Agriculture Faculty of Halu Oleo University, Kendari. The research was conducted in the dry season, from August to November 2015. The research was arranged meant by split plot design with two replications. The main plot is NPK fertilizer dose (S) consisted of three levels namely 56-36-25 kg ha-1 (S1), 90-54-25 kg ha-1 (S2) , 124-72-50 kg ha-1 (S3). The subplots was planting time of peanuts with maize intercropping (W) consisted of three levels, namely planting time of peanuts 10 days before planting (DBP) maize (W1), planting peanuts with maize simultaneously (W0), and planting peanuts 10 days after planting (DAP) maize (W2). There are nine treatment combinations of two factors mentioned. Each combination treatment was repeated three times, coupled with each of the three experimental plots for monoculture cropping systems of peanuts and maize. The total number of units was 45 units experimental. Data experiments were analyzed by using analysis of variance followed by Duncan's Multiple Range Test. The results showed that the treatment time 10 DBP planting peanuts with maize to increase productivity, reduce competition index and efficient of the use fertilizer. Provision of fertilizer NPK 124-72-50 kg ha-1 dose can increase growth and yield of maize and peanuts
Highlights
Southeast Sulawesi (SULTRA) is one of the areas that have the potential of dryland quite extensive which has been used for the development of food crops, especially maize and peanuts
Maize production in Southeast Sulawesi province in 2013 amounted to 67,578 tons of dry seed which had decreased by 10,869 tons (13.86%) compared with production in 2012
The results show that the effect of the interaction between the dose of NPK fertilizer and planting tangible and very real effect on plant height peanuts at age 42 HST and 56 HST highest dosage of NPK fertilizer 124-72-50 kg ha-1 and the treatment time peanut planting 10 days after planting corn but not significantly different from the dosage of NPK fertilizer 56-36-25 kg ha-1 and the treatment time of planting peanuts 10 days prior to planting corn
Summary
ILD at the age of 56 HST obtained at the highest dose treatment of NPK 90-54-25 kg ha-1 and the treatment time of planting peanuts 10 days prior to planting corn namely 0.20, a high leaf area index usually increases photosynthesis and the absorption of nutrients and the results of plant dry matter. The results show that the effect of the interaction between the dose of NPK fertilizer and planting tangible and very real effect on plant height peanuts at age 42 HST and 56 HST highest dosage of NPK fertilizer 124-72-50 kg ha-1 and the treatment time peanut planting 10 days after planting corn but not significantly different from the dosage of NPK fertilizer 56-36-25 kg ha-1 and the treatment time of planting peanuts 10 days prior to planting corn.
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