施氮量和密度互作对全覆膜旱作甜菜光合特性和块根产量的影响

闫威,李国龙,李智,曹阳,张少英

Effects of Nitrogen Application Rate and Planting Density Interaction on Photosynthetic Characteristics and Root Yield of Sugar Beet under Full-Film Mulching in Arid Regions

Wei Yan,Guolong Li,Zhi Li,Yang Cao,Shaoying Zhang

表6 施氮量和密度对全覆膜旱作甜菜根冠比（干重）的影响

Table 6 Effects of nitrogen application rates and planting densities on T/R (dry matter) of sugar beet under full-film mulching in arid regions

处理 Treatment 苗期 Seedling stage 叶丛快速生长期 Fast growth stage of leaves 块根糖分增长期 Sugar increasing stage of root 糖分积累期 Period of sugar accumulation D1N1 0.121cB 0.480bcBC 1.289bB 1.504eE D2N1 0.112dC 0.458deCDE 1.189dD 1.425fF D3N1 0.107eD 0.443efDE 1.160eDE 1.367gG D1N2 0.131aA 0.508aA 1.396aA 1.894aA D2N2 0.124bB 0.490bAB 1.235cC 1.744bB D3N2 0.111dC 0.466cdCD 1.195dD 1.688cC D1N3 0.112dC 0.494abAB 1.188dD 1.764bB D2N3 0.101fE 0.441fE 1.156eDE 1.587dD D3N3 0.093gF 0.419gF 1.126fE 1.452fEF F值F-value D 334.76** 78.44** 164.85** 234.51** N 787.94** 124.95** 236.04** 555.28** D×N 7.64** 5.40* 17.76** 13.14**