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3 施氮量和密度对全覆膜旱作甜菜SPAD值的影响

Table 3 Effects of nitrogen application rates and planting densities on SPAD value 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 56.6bB 52.5cC 53.6bB 46.3cBC D2N1 52.8dC 48.1eE 52.4cCD 45.3deCD D3N1 46.8gE 42.8hH 47.9fF 41.5gF D1N2 58.5aA 55.9aA 55.1aA 48.3aA D2N2 55.5cB 53.8bB 53.8bB 47.2bAB D3N2 51.7eC 50.7dD 52.7cBC 45.4dCD D1N3 55.5cB 46.7fF 52.4cCD 45.5dCD D2N3 52.0deC 44.8gG 51.4dD 44.5eDE D3N3 49.4fD 45.1gG 50.0eE 43.5fE F值F-value D 486.64** 513.03** 140.08** 117.81** N 157.63** 309.11** 159.70** 1 107.88** D×N 12.82** 100.32** 17.59** 10.09**