-
摘要: 采用正交设计设置氮、磷、钾3因素4水平的施肥试验,研究氮、磷、钾配比施肥对降香黄檀Dalbergia odorifera苗木生长及生理的影响。结果表明:①不同的氮、磷、钾配施处理对降香黄檀苗木各项生长生理指标均有显著影响。在9种配施组合处理中,氮0.45 g盆-1、磷0.30 g盆-1(N2P3K1)处理可以促进降香黄檀苗木的高、径生长和生物量的积累; N2P3K1和氮1.80 g盆-1、磷0.15 g盆-1(N3P2K1)处理有利于降香黄檀苗木叶绿素质量分数的提高;N2P3K1和氮0.45 g盆-1、磷0.15 g盆-1、钾0.60 g盆-1(N2P2K3)处理有利于可溶性糖质量分数的提高;②氮、磷、钾3种元素对降香黄檀苗木生长和生理的影响效应不同,以磷为最大,其次是钾,氮的影响效应最小;③降香黄檀苗木各项生长、生理指标与氮、磷、钾施用量之间存在二次函数关系。根据二次函数方程求得2年生降香黄檀苗木的合理养分元素施用量,氮肥为1.74~2.15 g盆-1、磷(P2O5)为2.40~2.60 g盆-1、钾(K2O)肥0.35~0.75 g盆-1。表4参12Abstract: Fertilization with different ratios of nitrogen(N),phosphorus (P),and potassium (K),for growth physiology of Dalbergia odorifera seedlings was tested using an L9(34)orthogonal design and regression analysis. Results among the nine combinations,showed that for growth of height and diameter as well as biomass accumulation,0.45 gpot-1 N,0.30 gpot-1 P2O5 (N2P3K1) was best;for increases of chlorophyll content in leaves, N2P3K1 and 1.80 gpot-1N,0.15 gpot-1P2O5 (N3P2K1) were best;and for increases of soluble sugar content in leaves,N2P3K1 and 0.45 gpot-1 N,0.15 gpot-1 P2O5,0.6 gpot-1 K2O (N2P2K3) were best. For growth and physiology,P was most important,then K,and then N. Quadratic regression models of growth and physiology for two-year-old D. odorifera seedlings were established for N,P,and K showing suitable application amounts of N as 1.74~2.15 gpot-1,P2O5 as 2.40~2.60 gpot-1,and K2O as 0.35~0.75 gpot-1.[Ch,4 tab. 12 ref.]
-
Key words:
- silviculture /
- Dalbergia odorifera /
- NPK ratio /
- seedling growth /
- seedling physiology
-
链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2012.02.021
计量
- 文章访问数: 4184
- HTML全文浏览量: 331
- PDF下载量: 1425
- 被引次数: 0