【摘要】 针对农业生产上忽略硅肥施用的问题,在洞庭湖平原区稻田开展不同施硅量对水稻的抗性、产量及经济性状影响的研究。结果表明:随着硅肥施用量的增加,水稻株高逐渐降低,T1(施硅肥量为7.5 kg/hm2)、T2(施硅肥量为15.0 kg/hm2)、T3(施硅肥量为22.5 kg/hm2)处理分别比对照(不施硅肥)降低4.21、7.90和8.24 cm。与对照相比,施硅肥处理降低了水稻植株的节间长度。处理T1、T2和T3的水稻植株二化螟枯鞘率分别比对照降低3.3、3.9和6.4个百分点,稻纵卷叶螟卷叶株率分别降低4.6、6.1和8.2个百分点,稻飞虱分别比对照减少186、225和299头/百丛;纹枯病病株率分别降低3.5、4.2和4.7个百分点。各处理水稻产量大小顺序为T3>T2>T1>CK,均显著高于对照,分别比对照增加10.51%、10.34%和8.02%。更多还原

【Abstract】 According to the problem that ignoring application of silicon fertilizer during agricultural production,the effects of different silicon fertilizer rates on resistance,yield and economic characters of rice were studied in Dongting Lake plain area.The results showed that with increasing silicon fertilizer rate,the plant height of rice decreased gradually.In comparison with control(without application of silicon fertilizer),the plant height in T1(silicon fertilizer rate was 7.5 kg/hm2),T2(silicon fertilizer rate was 15.0 kg/hm2) and T3(silicon fertilizer rate was 22.5 kg/hm2) decreased by 4.21,7.90 and 8.24 cm,respectively;the application of silicon fertilizer reduced the length between nodes of rice plant;the withered sheath rate caused by Chilo suppressalis in each treatment decreased by 3.3,3.9 and 6.4 points,respectively;the rate of curly-leaves plant caused by Cnaphalocrocis medinalis Guenee in each treatment decreased by 4.6,6.1 and 8.2 points,respectively;the number of rice plant hopper in each treatment decreased by 186,225 and 299 larvae/100 hill,respectively;the rate of sheath blight plant in each treatment decreased by 3.5,4.2 and 4.7 points,respectively.The yield of rice in each treatment ordered as T3 >T2>T1>CK,and they were all significantly higher than control,which increased by 10.51%,10.34% and 8.02% than control.更多还原