双季稻双直播模式不同早稻秸秆还田方式下氮肥运筹对晚稻生长发育和土壤理化性质的影响

江敏, 何爱斌, 孙会娟, 满建国, 聂立孝

Effects of Nitrogen Management on Growth and Development, Soil Physical and Chemical Properties of Late-Season Rice under Different Straw Retention Treatments of Early-Season Rice in Direct Seeding Mode of Double-Season Rice

Jiang Min, He Aibin, Sun Huijuan, Man Jianguo, Nie Lixiao

表2 不同早稻秸秆还田方式下2种氮肥运筹对晚稻幼苗素质的影响

Table 2 Effects of different straw retention treatments of early-season rice on seedling quality of late-season rice under two nitrogen managements

氮肥运筹 Nitrogen management 处理 Treatment 株高 Plant height (cm) 总白根数 Total white root number 根长 Root length (cm) 总根干重 Total root dry weight (g) 地上部干重 Total above ground dry weight (g) N1 CK 13.4±0.5a 111.0±3.2bc 4.7±0.5cd 0.15±0.01bc 0.50±0.01b SR 13.2±0.5a 103.0±5.8d 4.6±0.0cd 0.14±0.01bcd 0.49±0.01b SR+L 13.4±0.1a 117.0±3.5ab 4.5±0.1d 0.12±0.01de 0.47±0.01c SR+S 13.1±0.5a 103.5±7.3d 4.5±0.0d 0.13±0.01cd 0.47±0.02c SR+L+S 13.3±1.0a 111.0±3.7bc 4.5±0.0d 0.11±0.03e 0.47±0.01c 平均 13.3A 109.1A 4.5B 0.13B 0.48B N2 CK 13.2±0.4a 114.8±1.9ab 5.2±0.1a 0.18±0.02a 0.53±0.01a SR 12.9±0.2a 102.5±4.0d 5.0±0.4ab 0.16±0.01ab 0.53±0.02a SR+L 13.2±0.3a 119.8±1.3a 4.8±0.1bc 0.16±0.01ab 0.54±0.01a SR+S 12.9±0.2a 106.3±6.2cd 4.7±0.1cd 0.15±0.01bc 0.54±0.01a SR+L+S 13.1±0.7a 114.5±4.2ab 4.7±0.1cd 0.14±0.01bc 0.53±0.01a 平均 13.0A 111.6A 4.9A 0.16A 0.53A ANOVA N ns ns ** * ** S ns ** ** ** ns N×S ns ** ns ns *