Modeling chickpea growth and development: Nitrogen accumulation and use

摘要: Quantitative information regarding nitrogen (N) accumulation and its distribution to leaves, stems grains under varying environmental growth conditions are limited for chickpea (Cicer arietinum L.). The is required the development of crop models also assessment contribution N balances in cropping systems. Accordingly, these processes were quantified different (still without water or deficit) using four field experiments 1325 measurements. concentration ([N]) green leaves was 50 mg g-1 up beginning seed growth, then it declined linearly 30 at end phase. [N] senesced 12 g-1. Stem decreased from early season 8 maturity. Pod constant (35 g-1), but grain 60 43 Total ranged between 9 g m-2. closely linked biomass until efficiency (N relative accumulation) 0.033 where total -2 during period, 0.0176 later period when >218 During vegetative (up first-pod), 58% partitioned 42% stems. Depending on conditions, 37-72% leaf 12-56% stem remobilized grains. parameter estimates functions obtained this study can be used simulation simulate distribution.