Modeling of the Effects of Nitrogen Doses on Agronomic Characteristics and Leaf Area of Hypericum pruinatum L.
Keywords:
Hypericum, nitrogen fertilizer, modeling, agronomyAbstract
The effects of nitrogen treatments on leaf area and some agronomical characteristics of Hypericum pruinatum L. under greenhouse conditions were investigated in this research. The randomized block design with three replications was used as statistical analysis. According to the results, fresh and dry yields, plant height, flowering shoot number per plant increased significantly with elevating nitrogen doses. The prediction model was formulized as DP = a + (b x D). Where DP is dependent parameter (leaf width, leaf length, plant length, number of shoot, dry yield, and fresh yield) and D is nitrogen dose. According to prediction model, the leaf area model was found as LA= a + (b x W) + (c x L) where LA is leaf area, W is leaf width, L is leaf length and a, b, and c are coefficients. According to model equations the highest R² values was 99.6% in fresh yield and the lowest R² value was 86.8% in leaf length and they were found significant at the P<0.001 level.
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