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5 施氮量和密度对全覆膜旱作甜菜单株干物质积累量的影响

Table 5 Effects of nitrogen application rates and planting densities on dry matter accumulation per plant of sugar beet under full-film mulching in arid regions g

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 0.94deD 40.76deCDE 153.55cC 239.19cC D2N1 0.73fE 39.50fgEF 132.24fF 221.92eD D3N1 0.64gE 38.88gF 114.69hH 185.41gF D1N2 1.27bB 43.04bB 165.63bB 258.13bB D2N2 0.97dCD 45.33aA 155.61cC 238.91cC D3N2 0.86eD 41.50cdCD 138.02eE 222.35eD D1N3 1.41aA 44.67aA 173.93aA 274.20aA D2N3 1.08cC 42.10bcBC 147.19dD 236.44dD D3N3 0.91deD 40.33efDEF 118.73gG 202.73fE F值F-value D 170.54** 52.33** 1 428.61** 4 316.36** N 142.24** 110.45** 2 025.21** 554.58** D×N 3.17 17.49** 58.81** 472.02**