Rice Special Compound Fertilizer And Seedling Strengthen Agent On Rice Growth And Yield Formation

The study would like to use hybrid rice cultivar Fengyou-293 as the experimental material to investigate the effects of rice special compound fertilizer Jiahao brand Yangbaomu,Jiahao brand Suisuihuan and Jiahao brand Qianjinding on growth and yield formation of direct seeding rice.At the same time,the study investigated the effects of fertilizer combination Yangbaomu+Suisuihuan and fertilizer combination Yangbaomu+ Suisuihuan+Qianjinding on growth and yield formation of direct seeding rice,in order to provide the theory basis for the formula improvement and application of the rice special compound fertilizers.Taking hybrid rice cultivar Guangliangyou-558 as experimental material,the study investigated the effects of different seedling strengthen agent,Jiahao brand new seedling strengthen agent and one control seedling strengthen agent,on rice growth and yield formation,in order to provide the theory basis for the formula improvement and application of the seedling strengthen agent.Taking hybrid rice cultivar Guangliangyou-558 as experimental material,the study investigated the effects of different fertilizing methods of seedling strengthen agent,spreading Jiahao brand new seedling strengthen agent on the surface of seedbed and mixing Jiahao brand new seedling strengthen agent with substrate in the seedling plastics plate,on rice growth and yield formation.In order to find better fertilizing method of seedling strengthen agent.The main results as fellow:1.Rice special compound fertilizer Yangbaomu could promote tillering,increase maximum tiller,panicle density and 1000-grain weight.But the productive tiller rate was lower than control treatment.The experiment showed that Yangbaomu increased yield by 0.38 t hm-2.At tillering stage,jointing stage and full heading stage,Yangbaomu treatment increased SPAD value of leaf.Yangbaomu also increased leaf area index at jointing stage and photosynthetic potential in each growth period.Yangbaomu increased dry matter weight of overground parts of direct seeding rice at jointing stage and maturity stage,and increased the crop growth rate in sowing to jointing stage.Yangbaomu decreased the length of top three leaves,and reduced the area and dry matter weight of the the second and third leaf to top under the condition that Yangbaomu promoted the population growth of direct seeding rice.In addition,Yangbaomu increased the culm diameter and section modulus of basal internode,reduced lodging index.Based on the using of Yangbaomu,applying Suisuihuan could increase panicle density and increase the yield by 0.56 t hm-2.The experiment showed that Suisuihuan also increased photosynthetic potential in heading to maturity stage and increased the dry matter weight of overground parts of direct seeding rice at maturity stage.In addition,Suisuihuan reduced the length of basal internodes,plant height and gravity center height.Suisuihuan increased culm wall thickness of second internode,increased basal stem breaking resistence strength and reduced lodging index.Under the condition of this experiment,Qianjinding showed no obvious effects on growth and yield of direct seeding rice.The combination of Yangbaomu and Suisuihuan could promote growth of direct seeding rice and increased yield by 11.97%.2.Compared with the control seedling strengthen agent,Jiahao brand new seedling strengthen agent could increase spikelets per panicle and total spikelets per unit area,and increase yield by 0.82 t hm-2.New seedling strengthen agent increased the number of root,the number of white root and root dry matter weight,and increased the rooting ability.New strengthen agent treatment showed growth advantage after throwing transplanting in paddy.Using seedling strengthen agent could increase yield,improve seedling quality and promoted growth of rice after throwing transplanting in paddy.3.The research of yield and yield components of two treatments of seedling strengthen agent fertilizing methods showed no difference.Seedling quality and growth characters after throwing tranplanting between two treatments showed no difference as well.Compared with mixing seedling strengthen agent with seedling substrate in the seedling plastics plate,spreading seedling strengthen agent on the surface of seedbed didn't reduce yield,quality of seedling and the growth characters of rice after throwing transplanting.The method of spreading seedling strengthen agent on the surface of seedbed might be applied,but further research is needed.