Study on Ecological Characteristics of Growth of Taxodium mucronatumx Cryptomeria fortuneietcCoastal Shelterbelt Species in Different Site Conditions
In order to select species which were suitable for being planted in saline land and tidal flat in the southern coast of Zhejiang Province, the author extensively collected and introduced species which had salt tolerance and wind resistance, conducted regional test. The results showed that: soil conditions along the coast were complex, in new reclaimed coastal land, soil salinity increased gradually with depth; l‰-3‰ salinity of 36 candidate species, 3‰- 5‰ salinity of 28 candidate species, 5‰-8‰ salinity of 16 candidate species; Ficus concinna var. Subsessilis, Taxodium mucronatumx Cryptomeria fortunei etc. 19 species showed strong wind resistance, with trees grew older, the rate dropped down that trees were blew down by the wind; crown diameter/height ratio of shelterbelt species of different age classes was between 0.45-1.13, Ficus concinna var. Subsessilis, Buxus megistophylla, Nerium oleander were the highest, relative crown length values of Nerium oleander, Buxus megistophylla were more, must be planted with other species, and the protective effect could play better; the annual growth rhythm of several high resistance species showed, the order from high to low was: Eucalyptus dunnii (1.18 cm/a)> Casuarina equisetifolia 501 (1.16 cm/a)> Taxodium mucronatumx Cryptomeriafortunei (1.08 cm/a) >Ficus concinna var. Subsessili (1.07 cm/a) >Sapium sebiferum s (0.92 cm/a). And the diameter growth rate was: Ficus concinna var. Subsessilli (1.58 cm/a) >Eucalyptus dunnii (1.35 cm/a) > Casuarina equisetifolia 501 (1.15 cm/a)>Taxodium mucronatumxCryptomeria fortunei(1.06 cm/a) > Sap/urn sebiferums (0.93 cm/a).
different site conditionsshelterbelt speciesgrowthecological characteristics
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万方数据
维普
