施氮磷钾肥对短肋羽藓的生长生理及植株呈色的影响 postprint

Abstract: Thuidium kanedae is a kind of moss with wide distribution and high landscape value. However, we lack information about cultivation of Thuidium kanedae. To investigate an appropriate scheme of fertilization for the growth and development of Thuidium kanedae, pot culture experiments were conducted with no fertilization (CK) as control, using urea (N fertilizer), calcium superphosphate (P fertilizer) and potassium sulfate (K fertilizer) combination treatment, set three levels (1-3) fertilization schemes. We investigated the growth length, coverage and color ratio of Thuidium kanedae in various treatments, and we confirmed the fertilization scheme conducive to its growth. At the same time, the changes of related physiological indexes of plants in the optimal fertilization scheme were measured to explore the effects of fertilizer on the growth and physiological characteristics of Thuidium kanedae. The results were as follows: (1) The coverage of Thuidium kanedae under N1 and N2P2K2 treatments were the highest and significantly higher than that of CK. The plant length under N1 and N2K2 treatments was the highest and larger than CK. N3P3K3 and N2P2K2 treated plants had the best green degree maintenance. (2) N fertilizer and combined application of NK and NPK had the best promotion effect on the growth of Thuidium kanedae. Overall, the content of chlorophyll, carotenoid and soluble sugar in these treatments was higher than that of CK, while the content of soluble protein was lower than that of CK. (3) The correlation analysis showed that the green proportion was highly significantly and positively correlated with the coverage, the growth length was highly significantly and negatively correlated with the chlorophyll content of the plant. The results of this study illustrated that different treatments of fertilizer have different effects on the growth and color of Thuidium kanedae. N fertilizer should be the main fertilizer for Thuidium kanedae, and P and K combined application should be supplemented. N2P2K2 (N, P, K fertilization rates were 26, 14, 28 kg・hm-2・ a-1) treatment had the best effect on the growth status and green degree of Thuidium kanedae.