Growth responses of Lycoris longituba to application of soybean meal and P-K fertilizers
A furrow fertilizer application method was carried out, in which bulb of Lycoris longituba was planted on the top of casing soil over the applied fertilizer, soybean meal fertilizer at the bottom and superphosphate and potassium chloride fertilizer on the upper layer, to study the fertilizing effects of different usages of soybean meal and chemical fertilizer on the leaf growth and bulb biomass. Results showed that relative leaf biomass decreased with the fertilization amount at the late stage of the first growth season. The fertilization did not significantly increase average leaf count, leaf length and bulb biomass in the following 2 years. Bulb of L. longituba grew slowly, and the average annual compound growth rate of fresh bulb weight was only about 41%. It is suggested that relative fertile soil be selected to plant Lycoris longituba, and the principal of multiple and light fertilizations were suggested to follow.