摘要
为了弄清干旱沙地深根苗超深栽造林后的成效,以樟子松(Pinus sylvestris var.mongolica Litv.)为研究对象,在张家口宣化黄羊滩沙地采用深根苗和普通容器苗进行了超深栽和常规栽植(深根苗超深栽造林栽植深度1m、普通容器苗常规栽植深度0.3m)试验,在栽植后第2年,对沙地旱季和雨季的土壤含水量、各处理苗木的保存率、地上部、地下部的生长及根系发育等进行了调查。结果表明:(1)在旱季,沙地上层土壤(0~40cm)的含水量较低,而深层土壤(60cm以下)无论旱季和雨季均保有较高的含水量。(2)与普通容器苗常规栽植相比,在沙地采用深根苗进行超深栽造林,能使造林保存率显著提高21.6个百分点。(3)相对于普通容器苗常规栽植苗木,深根苗超深栽造林苗木具有显著高的生物量和更加发达的根系。(4)普通容器苗常规栽植苗木的根系表面积主要分布在0~40cm土层,深根苗超深栽造林苗木的根系表面积较为均匀地分布在0~100cm土层中,且其根系活力不低于普通容器苗常规栽植苗木。综上所述,在沙地采用深根苗进行超深栽造林,在栽后无灌水的条件下,不仅能获得较高的保存率,还能促进苗木的生长,这主要是由其具有更加发达的根系和较为合理的根系空间分布决定的。
In order to clarify the effects of long-root seedlings after afforestation with extra-deep-planting in arid sandy land,Pinus sylvestris var.mongolica.was taken as the research object.In Huangyangtan sandy land of Zhangjiakou,Long-root seedlings were extra deeply planted at 1 m depth under the soil surface,and common container seedlings were conventionally planted at 0.3 m depth under the soil surface.In the second year after planting,soil water contents were measured in dry and rainy seasons,and preservation rate,shoot and root growth parameters of seedlings with different treatments were measured at the end of the experiment.Results showed that:(1)In the dry season,the soil moisture content in the upper layer(0~40cm)of sandy land was lower,while the deep soil(below 60cm)had a higher soil moisture content in both the dry season and the rainy season.(2)Compared with the conventional planting of container seedlings,the extra deeply planting of long-root seedlings in sandy land could significantly improve of the preservation rate.(3)Compared with conventional container seedlings,long-rooted seedlings with extra deeply planting had significantly higher container seedlings was mainly distributed in the 0~40cm soil layer,while the root surface area of the long-rooted seedlings with extra deeply planting was more evenly distributed in the 0~100cm soil layer,and the root activity was not lower than that of the conventional planted seedlings with common container seedlings.To sum up,using long-rooted seedlings for extra deeply planting in sandy land can not only achieve a higher survival rate,but also promote the growth of seedlings under the condition of no irrigation after planting,which is mainly due to its more developed root system and more reasonable root spatial distribution.
作者
梁悦军
田玉童
王学勇
赵志新
徐振华
李向军
LIANG Yue-jun;TIAN Yu-tong;WANG Xue-yong;ZHAO Zhi-xin;XU Zhen-hua;LI Xiang-jun(Maojingba Forestry Centre of Hebei State-owned Forest Farm Management Office,Longhua,Hebei 068150,China;Zoo Management Office of Shijiazhuang Graden Bureau,Shijiazhuang,Hebei 050020,China;Hebei Academy of Forestry and Grassland Sciences,Shijiazhuang,Hebei 050000,China;Hebei Technical Innovation Center for Forest Improved Variety,Shijiazhuang,Hebei 050061,China;Hebei Fengning Desert Ecosystem Research Station,Chengde,Hebei 068357,China)
出处
《河北林业科技》
2023年第2期10-15,共6页
Journal of Hebei Forestry Science and Technology
基金
中央财政林业和草原科技推广示范项目“坝上生态公益林树种更新及修复关键技术示范与推广”(冀TG[2023]008)
“坝上防风固沙林经营修复技术示范与推广”(冀TG[2022]016)。
关键词
超深栽
保存率
沙地造林
樟子松
深根苗
extra deeply planting
preservation rate
afforestation in sandy land
Pinus sylvestris var.mongolica Litv.
long-root seedlings
