Topdressing Amino Acid Water-Soluble Fertilizer by Unmanned Aerial Vehicles Increases the Yield and Profit of Mid-Season Rice in Southern China
Field experiments were carried out to screen out the fertilizers suitable for topdressing of rice by unmanned aerial vehicles(UAVs)in Pengze County of Jiangxi Province.Three treatments were designed,including water(T1),liquid urea(T2),and amino acid water-soluble fertilizer(T3).The SPAD value of flag leaf,rice yield,and profit in each treatment were analyzed.The results showed that the SPAD value of flag leaf in each treatment presented a trend of first increasing and then decreasing over time,and it was higher in T2 and T3 than in T1.Compared with T1,T2 and T3 increased the rice yield by 2.1%-5.2%and 7.0%-8.6%,respectively,which was mainly achieved by increasing the panicle number and seed setting rate.The rice yield in T3 was 3.3%-4.8%higher than that in T2.Furthermore,T3 had higher profit than T1 and T2,and the latter two had no significant difference in profit.Therefore,topdressing of amino acid water-soluble fertilizer by UAVs can be adopted to increase the yield and profit of mid-season rice in southern China.
amino acid water-soluble fertilizertopdressing of riceSPAD valueunmanned aerial vehicle
万方数据
维普
