| Through the field experiment and soil incubation in greenhouse, and sand incubation test, the characteristics of nutrient absorption and distribution in Oriental hybrids (Siberia) of lily were investigated, the sameness and differences in different hybrids of cut-flower lily were analyzed, and the dedication of lily bulb to mineral nutrition was evaluated. The results showed as follows.1 The field experiment showed that before flower bud appearance, the plant mainly used the materials stored in the bulb. The period of nitrogen absorbed highest was about thirty days after flower bud appearance, and the period of phosphorus was about forty-five days after flower bud appearance; however, the absorption peak of potassium was earlier than that of nitrogen and phosphorus, it was from leaf expansion to harvest, about seventy-five days. Before the flower bud appearance, the contents of N, P and K in leaf were higher than stem which was higher than the underground parts, then, the contents of the nutrient in the underground parts were higher and higher. At harvest, the contents of N, P, and K in leaf and stem were lower than that in flower-bud and the underground parts. The results also showed that the ratio of N, P, K in the whole plant was 1: 0.17: 1.08 before flower bud appearance and 1: 0.15: 1.45 after flower bud appearance.2 Soil incubation test presented five results, (1)the plant mainly used the materials stored in the bulb during prophase (about 47 days) to 3 hybrids (Oriental hybrids, Longiflorum hybrids and Asiatic hybrids) at the different procreation stages. Then, the center of growth was transferred and lily plant started to absorb the nutrients from environment. (2)During the whole procreation stages, the N, P, K concentration was basically invariable in bulb and root, while it descend gradually in leaf, stem and bud. During prophase, the N, P, K concentration in leaf and stem was higher than that in different organs of underground, but during cut-flower stages, the stem was the organ of lowest nutrient concentration, except for the K concentration of Longiflorum hybrids and Asiatic hybrids. (3)During the whole procreation stages, The N, P, K content was almost invariant in root; it was declined before the first 47 days in bulb, henceforth, Oriental hybrids and Longiflorum hybrids was increased ,while Asiatic hybrids did not changed too much; but the N, P, K content was increased in bud at all times; the N, P, K content were increased in leaf and stem after transplant, and decreased during cut flower stage. (4)Absorption quantities were different in 3 hybrids. If the nutrients of outside were enough, the Oriental hybrids of lily absorbed most and the contents of N,P and K were 0.19g/plant, 0.056g/plant and 0.31g/plant, respectively; Longiflorum hybrids of lily absorbed least and the contents of N,P and K were 0.12g/plant, 0.012g/plant and 0.19g/plant, respectively; and the contents of N,P and K in Asiatic hybrids of lily were 0.12g/plant, 0.023g/plant and 0.28g/plant, respectively. The resultsalso showed that the ratio of gross N, P, K in the whole plant was 1 0.11~ 0.17D1.08~ 1.50 in Oriental hybrids of lily; Longiflorum hybrids of lily was about 1 D0.09D1.30; and Asiatic hybrids of lily was fluctuate from 1 O.1~0.15 O.73~0.89. At other words, the cut lily flower absorbed more N and K, but little P. (5)The concentration and contents of nutrients in the lily under fertilization were higher than CK, while biomass was enhanced, and the quality of flower was improved by fertilization.3 Sand incubation experiment showed that during Oriental hybrids lily growth, whether provide nutrients or not, cut-flower lily could complete its lifecycle, but the nutrients were important to the latter growth of lily. The concentration and contents of nutrients in the lily incubated by nutrients were higher than the lily incubated by water, while biomass was enhanced, and the quality of flower was improved by application of nutrients. The consequent study showed that N, P and K had different effects to the growt... |
PDF Full Text Request