溶解氧浓度对水稻分蘖期根系生长及氮素利用特性的影响

胡继杰,钟楚,胡志华,张均华,曹小闯,刘守坎,金千瑜,朱练峰

Effects of Dissolved Oxygen Concentration on Root Growth at Tillering Stage and Nitrogen Utilization Characteristics of Rice

HU JiJie,ZHONG Chu,HU ZhiHua,ZHANG JunHua,CAO XiaoChuang,LIU ShouKan,JIN QianYu,ZHU LianFeng

表3 不同溶解氧浓度水稻氮素利用效率和干物质生产的差异

Table 3 Difference in N use efficiency and dry matter accumulation of rice under different dissolved oxygen concentrations

品种 Variety 处理 Treatment 干物质量 Dry matter (g/plant) 产量 Yield (g/plant) 氮收获指数 N harvest index 收获指数 Harvest index 氮素干物质生产效率 N use efficiency for biomass production (kg·kg-1) 氮素籽粒生产效率 N use efficiency for grain production (kg·kg-1) 中浙优1 号ZZY 1 CK 56.90b 24.16b 0.51a 0.42a 67.50bc 28.74a T1 56.75b 21.78c 0.45b 0.38b 69.44a 26.57b T2 61.23a 26.79a 0.53a 0.44a 67.88b 29.68a T3 54.20b 19.58d 0.44b 0.36b 67.04bc 24.14c T4 44.26c 11.56e 0.32c 0.26c 66.50c 17.27d IR45765-3B CK 51.37a 23.36a 0.55a 0.45a 67.50ab 30.68a T1 49.84ab 18.94b 0.45b 0.38b 68.40a 25.81b T2 52.15a 23.57a 0.55a 0.45a 66.94ab 30.23a T3 46.60b 17.96b 0.47b 0.39b 66.93ab 25.79b T4 36.62c 10.04c 0.34c 0.27c 65.78b 18.03c 中旱221 ZH 221 CK 37.82ab 17.09b 0.56b 0.45b 67.77b 30.31bc T1 37.75ab 16.81b 0.56b 0.44b 69.04a 31.04ab T2 39.22a 18.97a 0.61a 0.48a 67.62bc 32.70a T3 36.21b 15.80b 0.55b 0.44b 66.81bc 29.10c T4 32.11c 13.88c 0.54b 0.43b 66.53c 28.79c