Study On The Effect Of Foliar Fertilizer And Fungicide On Rice Growth In Eastern Jilin Province And Its Application Effect

Foliar fertilizer spraying can promote the growth and development of rice in the middle and late growth stages,which has the characteristics of simple application method,good effect and high utilization rate.The application of compatible fungicides at the same time of foliar fertilizer spraying can improve labor efficiency and save production cost.Therefore,the field experiment method was used to systematically study the effect of spraying water-soluble fertilizer twice and 75% water-soluble fertilizer on rice leaves at break stage and booting stage In order to provide a theoretical basis for the application of foliar fertilizer and fungicide in the middle and later stages of rice,the effects of Imazethapyr tebuconazole fungicide on root development,growth,photosynthesis,dry matter accumulation,disease resistance,final yield and quality of rice were studied.The main conclusions are as follows:(1)Spraying twice water-soluble fertilizer and 75% imazethapyr-tebuconazole fungicide on rice leaves at break stage and booting stage could significantly promote the growth and development of rice roots,and the combined application of water-soluble fertilizer and 75% imazethapyr-tebuconazole fungicide could significantly promote the growth and development of rice roots The total root length,root surface area,root projected area and root volume increased by 17.28%,22.25%,7.58 and 73.31% respectively when the fungicide and water-soluble fertilizer were used alone.(2)Spraying twice water-soluble fertilizer and 75% imazethapyr tebuconazole fungicide on rice leaves at break stage and booting stage could significantly promote the growth of rice.The promotion effect of water-soluble fertilizer combined with 75% imazethapyr tebuconazole fungicide on rice plant height was significantly greater than that of 75%imazethapyr tebuconazole fungicide and water-soluble fertilizer alone,and there was no significant difference in rice plant height at milk stage.(3)Spraying twice water-soluble fertilizer and 75% imazethapyr tebuconazole fungicide on rice leaves at crevasse stage and booting stage could significantly promote photosynthesis of rice leaves.The combined application of water-soluble fertilizer and 75% imazethapyr tebuconazole fungicide could significantly promote SPAD value and photosynthetic rate value of rice leaves,which were significantly higher than that of 75% imazethapyr tebuconazole fungicide and water-soluble fertilizer alone.(4)Spraying twice water-soluble fertilizer and 75% imazethapyr tebuconazole fungicide on rice leaves at crevasse stage and booting stage could significantly promote the accumulation of nutrients in rice.The combined application of water-soluble fertilizer and75% imazethapyr tebuconazole fungicide could significantly promote the dry weight and fresh weight of rice shoots,which were significantly higher than that of 75% imazethapyr tebuconazole fungicide and water-soluble fertilizer alone.(5)Spraying twice water-soluble fertilizer and 75% imazethapyr-tebuconazole fungicide on rice leaves at break stage and booting stage could significantly improve the disease resistance of rice.The control effect of water-soluble fertilizer and 75% imazethapyr-tebuconazole fungicide on Rice Blast,sheath blight and false smut was more than 75% when the fungicide was used alone,the control effect was more than 97.85% after spraying twice.(6)The results showed that the 100 grain weight and yield of rice could be significantly increased by spraying granular water-soluble fertilizer,75% imazethapyr tebuconazole fungicide and the combination of granular water-soluble fertilizer and 75% imazethapyr tebuconazole fungicide.The percentage of 100 grain weight increased by 75% imazethapyr tebuconazole fungicide was more than 12.08 %,and the yield was 14859 kg/ha.The yield increase rate was above 7.73 %.(7)The results showed that the quality of rice could be significantly improved by spraying granular water-soluble fertilizer,75% imidoxystrobin tebuconazole fungicide and the combination of granular water-soluble fertilizer and 75% imidoxystrobin tebuconazole fungicide,and the chalky grain rate of rice could be significantly reduced by using water-soluble fertilizer and 75% imidoxystrobin tebuconazole fungicide.