Key Technologies for Rapid Rooting and Algae Inhibition in Hydroponic Kumquat Cultivation
To elucidate the pivotal technologies facilitating root formation and algae suppression in hydroponic cultivation of kumquat(Citrus japonica Thunb.),we conducted a comparative analysis assessing the impact of different rooting agents,nutrient solutions,and algicides on root development,nutrient absorption,and green algae content in hydroponic kumquat.The results showed that:after in-cubating in water for 50 days,a marked increase in root emergence was observed in 10%and 30%of kumquat plants treated with 50 mg·L-1 of IAA and IBA for 12 hours,respectively,with average root lengths of 10.2 mm and 15.3 mm.In contrast,no discernible root growth was detected in plants treated with 50 mg·L-1 of NAA or water after 50 days.The porosity of kumquat roots increased signifi-cantly after 35 days of cultivation in the Dutch Flowers&Horticulture Research Institute formula nutrient solution,the highest porosity and extensive aerenchyma formation were found in the roots supplied with Japanese horticultural universal formula,however,kumquat roots grown in the Hoagland nutrient solution were atrophied and lysed.Furthermore,the nutrient absorption of N,P,and K was high-est in kumquat plants treated with the Japanese horticultural universal formula.Compared with control,supplement of biochar and an-tibiotics in the Japanese horticultural universal formula for 4 weeks significantly inhibited green algae growth by 23%and 70%,re-spectively,while the inhibitory effect of copper ions on green algae was not significant.In summary,soaking the plants in 50 mg·L-1 of IBA for 12 hours,followed by transferring to the Japanese horticultural universal formula with 10 mg·L-1 of sulfonamide antibiotics,can accelerate the rooting process and inhibit green algae growth in the hydroponic production of kumquat.
万方数据
维普
