施肥配比与芸苔素内酯对油茶生长的影响研究
Effects of Fertilizer Formula and Brassinolide on Growth of Camellia oleifera
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摘要: 采用L9(34)正交试验设计,分别对长林系列3个优良油茶无性系进行施肥配比和叶面喷施芸苔素内酯(BR)试验研究,结果表明:(1)油茶品种是影响油茶各项生长指标的最根本的因素;(2)各因子对地径、冠幅、产量和净光合作用影响权重依次是品种、因子间互作、施肥和芸苔素内酯,施肥对叶绿度影响比因子间互作影响大,而对高生长影响刚好相反;对出籽率影响依次是品种、施肥、芸苔素内酯及因子间互作;(3)18号品系、N2P2K2和0.067 mg·L-1 芸苔素内酯浓度组合时,树高、冠幅和出籽率表现最好;4号品系、N1P1K1和0.067 mg·L-1芸苔素内酯组合时,地径增长、叶绿度和产量最大;4号品系、N2P2K2和0.033 mg·L-1芸苔素内酯组合时,日均净光合速率最大。Abstract: In order to study the best dosage of fertilizer and brassinolide (BR) for the growth of Chang-Lin 4, Chang-Lin 166 and Chang-Lin 18 camellia clones, L9(34) orthogonal experiment design was adopted to test the fertilizer formula and foliar spraying BRs for the three clones. The results are as follows: (1) Varieties is the critical factor affecting the growth index of camellia. (2) The weights of various factors affecting ground diameter, crown diameter, yield and net photosynthesis are in the order of variety, interaction among factors, fertilizing and BRs. Fertilizing has stronger effect on leaf SPAD value than the interaction among factors, while the latter has stronger effect on height growth than the former. The factors affecting the seeding rate are variety, fertilizing, BRs and interaction among factors. (3) With the treatment composition of Chang-Lin 18, N2P2K2 and 0.067 mg·L-1 BRs, the indexes of tree height, crown diameter and seeding rate are the highest. With the treatment composition of Chang-Lin 4, N1P1K1 and 0.067 mg·L-1 BRs, the ground diameter, leaf SPAD value and the yield are the highest. With the treatment composition of Chang-Lin 4, N2P2K2 and 0.033 mg·L-1 BRs, the daily average net photosynthesis rate is the highest.
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Key words:
- camellia variety
- / fertilizing
- / BR
- / interaction
- / photosynthesis
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