Effects of Lüjuneng Compound Fertilizer on Yield,Root Traits and Nitrogen Uptake and Utilization of Wuyunjing 23
To investigate the effects of the new type middle east Lüjuneng compound fertilizer on the yield,root characteristics and nitrogen ab-sorption and utilization of Wuyunjing 23 rice,the experiments were designed under pot cultivation and field cultivation conditions. Compared with conventional compound fertilizer,the yield of Lüjuneng compound fertilizer was increased in pot experiment and field experiment.The high-er the application amount or proportion,the greater the yield increase. The earlier the application,the better the yield increase. Field tests showed that MT5 and HT5 treatment had the best yield increase effect. The increase of yield was mainly due to the significant increase of ear number. The average nitrogen accumulation in maturity stage was increased by 24.9％,and the average nitrogen accumulation in contrast,appli-cation and application period was increased by 30.03％,23.66％ and 20.79％,respectively. With the increase of Lüjuneng application rate,ni-trogen accumulation showed an increasing trend,and the effect of early application was obviously greater than that of late application. Nitrogen harvest index,nitrogen use rate,nitrogen agronomic use rate and nitrogen partial productivity were all promoted.With the increase of Lüjuneng application rate,the latter three indexes showed an increasing trend. At 30 days after planting,the number of adventitious roots per plant,total length of adventitious roots per plant,root dry weight per plant,total absorbed area and active absorbed area were lower,while the root activity per plant,longest root length and mode root length were higher. At heading stage,the above root characters were higher than control group (CK),but the root-shoot ratio was lower than CK. Root-shoot ratio at maturity was higher than that of CK. The application of Lüjuneng com-pound fertilizer significantly promoted the increase of ear number,yield and nitrogen use efficiency of rice.
Lüjuneng compound fertilizerRiceYieldRoot characterNitrogen absorption and utilization
万方数据
维普
