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依据利用价值进行分类，赤峰市现有灌木资源可分为纤维类、油脂类、药用类等7类。赤峰市灌木资源丰富，蓄积量大，共有树种169种，而且用途广泛，一个树种有的还同时具有多种用途。在大力开发赤峰市灌木资源的同时，还应充分利用每一树种的多种用途，做到材尽其用。对于利用价值高、开发潜力大的灌木树种应充分开发和利用，变资源优势为经济优势，更好地为经济建设服务。在实际利用中，建议大面积人工栽培，增加蓄积量，并对他们进行充分的合理利用，以创造尽可能多的经济价值。在利用的同时要注意保护．不仅保护珍稀树种．还要保护天然植被，以使赤峰市灌木资源得到更加充分的利用。 相似文献
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甘肃灌木产业化发展问题的初步探讨 总被引：1，自引：0，他引：1
在分析甘肃灌木产业发展的必要性、必然性以及可能性的基础上，提出了灌木资源培育要与区域生态经济发展相结合，以产业化带动灌木资源培育，用可持续发展思想指导灌木资源培育和产业化发展，因地制宜，合理确定发展重点的发展思路以及对策。 相似文献
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经调查研究,从观赏、食用、药用三个层面,报道了长白山区灌木资源开发利用现状。长白山区已开发利用的观赏类灌木主要有33种,食用类灌木主要有14种,药用类灌木主要有7种。通过分析,提出具开发潜力的灌木18种。对长白山区灌木资源的开发利用进行了展望。 相似文献
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云南豆科蛋白饲料灌木的研究现状和利用前景 总被引：7，自引：2，他引：5
豆科灌木树种具有蛋白质含量高、适应性强、生长快、易采收等特点, 是比较理想的植物蛋白质资源。云南山地广阔, 豆科蛋白质饲料灌木资源丰富, 但开发利用尚不充分, 仅有木豆、马鹿花等少数几个种做过较为深入的营养成分和营养价值研究。广泛栽培、采集、加工利用豆科灌木中有饲用价值的灌木, 代替饲料用粮,是云南省解决粮食问题和畜牧业发展的新途径。 相似文献
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内蒙古生态灌木生物质能源开发方略 总被引：5，自引：0，他引：5
针对内蒙古丰富的灌木资源,探讨灌木资源有效开发利用途径。主要阐述了以利用促进过熟灌木林的稳定和抚育更新,灌木生物质能源产业化建设面向能源和环保等领域的重大需求,应用国内优势的木质固化压缩成型设备及技术和丰富的灌木资源利用而开展产业化建设,促进生物质产业的健康发展,以提高灌木生物质产品的经济效益和以利用促灌木生态林的稳定性,拉动广大农村牧区的产业和经济的健康发展。 相似文献
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在乌兰布和沙漠地区,研究了中沙冬青、梭梭、白刺、霸王、柠条等5种沙生灌木的生理生长指标的差异性,结果表明:这些灌木树种的净光合速率、气孔导度、蒸腾速率、水分利用效率等气体交换特征和株高、地径、冠幅等生长指标在不同起源之间均具有显著差异,且人工起源植株的气体交换特征均比天然起源植株的大,而生长指标则均比天然起源植株的小;天然林和人工林中不同树种的水分利用效率的差异均不显著,但不同树种的净光合速率、气孔导度、胞间CO2浓度、蒸腾速率等气体交换特征和株高、地径、冠幅等生长指标差异却很显著.在测定光响应曲线和CO2响应曲线基础上求算出的最大光合速率、表观量子效率、光补偿点、光饱和点、暗呼吸速率、CO2补偿点和羧化效率等光合响应曲线参数在不同树种以及不同起源之间的变化也很大,并据此提出不同树种的人工林栽培及天然林保护措施. 相似文献
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We quantified leaf phenologies of saplings and overstory trees of sugar maple (Acer saccharum Marsh.) and American beech (Fagus grandifolia Ehrh.), and the shrub hobblebush viburnum (Viburnum alnifolium Marsh.) in a 72-year-old northern hardwood forest. Seasonal changes in irradiance in the shrub layer, and in the leaf CO(2) exchange of viburnum, and sugar maple and beech saplings were also measured. Leaf expansion occurred earlier in the spring and green leaves were retained later in the autumn in saplings and shrubs than in overstory trees. During the spring light phase (before overstory closure), large CO(2) gains by all three shrub-layer species occurred as a result of a combination of relatively large leaf area, high photosynthetic capacity, and high irradiance. Throughout the summer shade phase, photosynthetic capacity at a given irradiance remained relatively constant, but CO(2) gain was typically limited by low irradiances. Even though irradiance in the shrub layer increased during the autumn light phase as the overstory opened, CO(2) gains were modest compared to springtime values because of declining leaf area and photosynthetic capacity in all three species. The CO(2) gains during the spring light phase, and to a lesser extent during the autumn light phase, may be important to the carbon balance and long-term persistence of saplings and shrubs in the usually light-limited shrub layer of a northern hardwood forest. Therefore, for some late-successional species, leaf phenology may be an important characteristic that permits their long-term persistence in the shrub layer of mature northern hardwood forests. 相似文献
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4种油松混交灌木树种的耐阴性研究 总被引：1，自引：0，他引：1
为探讨油松混交灌木树种的耐阴性,通过设置不同程度的遮阴处理,对柠条、紫穗槐、荆条、沙棘等4个辽西地区常见的油松混交灌木树种的叶绿素含量及光响应曲线参数进行了测定。研究结果表明,不同树种间叶绿素a/b值差异不显著,不同遮阴处理间差异极显著。4个灌木树种随着遮阴强度的增大,其叶片叶绿素a/b值均表现出波浪式的变化趋势,变化曲线的最低值出现在45%透光率处理时,全光状态下和5%透光率遮阴处理时,各树种的叶绿素a/b值基本相近。从4个灌木树种的光响应曲线参数数值上看,沙棘的各项指标数值均最高,其次是紫穗槐。荆条的光补偿点、表观量子效率、暗呼吸速率都是最低的,虽然其光能利用率较低,但是因为其呼吸速率低,所以进入积累干物质状态的速度较快,且其最大净光合速率较低,利用弱光的能力较强,是4个灌木树种中耐阴性最强的,其次是柠条,耐阴性最差的是沙棘。 相似文献
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以西藏主要类型灌木林为研究对象,基于全区2002年森林资源分布图,分析了影响西藏各主要类型灌木林空间分布的主要环境因子,提取了包括经度、纬度、海拔、坡向、坡位和坡度等6个环境因子的数据,并对数据进行梯度划分,应用多重对应分析方法,定量研究了环境因子对西藏各主要类型灌木林空间分布的影响程度,并进行了影响因子排序。研究结果表明,总体上看,西藏主要类型灌木林的空间分布均在不同程度上受大尺度环境因子的影响,主要表现在经纬度和海拔上;在小尺度上,各环境因子通常表现为共同影响灌木林的分布。 相似文献
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We studied morphological and physiological leaf and whole-plant features of seedlings of six late-successional woody species common in the Xishuangbanna lowland rain forest in southwest China. Study species differed in adult stature and shade tolerance and included the shrubs Lasianthus attenuatus Jack and Lasianthus hookeri C.B. Clarke ex Hook. f.; the sub-canopy species Barringtonia macrostachya (Jack) Kurz and Linociera insignis C.B. Clarke; the canopy tree Pometia tomentosa (Blume) Teijsm. & Binn.; and the emergent species Shorea chinensis (Wang Hsie) H. Zhu. After 1 year of growth in low light (4.5% full sun), seedlings were transferred to high light (24.5% full sun) to investigate acclimation responses of existing leaves to forest gap opening and to determine whether seedling capacity for acclimation is a limiting factor in its natural regeneration. Leaves of the shrub species are shade-adapted, as indicated by their low photosynthetic capacity, efficiency in using sunflecks, low stomatal density, low Chl a/b ratio and high spongy/palisade mesophyll ratio. The shrub species utilized sunflecks efficiently because they had a short photosynthetic induction time and low induction loss. In all species, transfer of seedlings to high light resulted in a substantial initial reduction in the dark-adapted quantum yield of photosystem II (variable chlorophyll fluorescence/maximum chlorophyll fluorescence; Fv/Fm) at midday. Predawn Fv/Fm of the taller species did not change greatly, but predawn Fv/Fm of the shrub species decreased significantly without complete recovery within 25 days of transfer to high light, indicating chronic photoinhibition and damage to the previously shade-adapted leaves. Maximum net photosynthetic rate and dark respiration of the four taller species increased considerably after transfer to high light, but not in the shrub species. Similar trends were observed for the number of newly formed leaves and relative height growth rate. We conclude that the shrubs L. hookeri and L. attenuatus have limited potential for developmental and physiological acclimation to high light, which explains their absence from forest gaps. Compared with the shrub species, the taller tree species, which are more likely to experience high light during their life span, showed a greater potential for light acclimation. Physiological differences among the four tree species were not consistent with differences in adult stature. 相似文献
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指出了植物品种选择是工程边坡植物防护措施关键,应从生态适应性、功能综合性、抗逆性等方面考虑选择。以金安桥水电站同时具有明挖和洞挖弃渣的渣场为研究对象,通过植被分析及灌草种适应性分析确定了适宜灌草种。灌草种发芽播种实验结果表明：选择的10种参试灌草种自然发芽率最高的为高羊茅80．89％,除火棘外其余9种灌草种自然发芽率均大于75％;洞挖弃渣块石过多,灌草种保存率均低于30％,覆土后进行植物措施;明挖弃渣和弃渣覆土发芽率均大于60％且其56d苗木保存率均大于60％的5种灌草种为：紫羊茅、白三叶、黑麦草、高羊茅、白三叶,其播种后6个月苗木生长高度也较好。选择以上5种灌木、草本植物,可满足渣场边坡的防护要求。 相似文献
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利用梅花五点法测定了重庆市主城区公园的重要7种植物群落结构在夏季减少光照强度、降低温度和增加空气湿度等的指标,比较了不同群落结构对这3项小气候因素的调节效果。研究结果表明:各种植物群落结构对此3项小气候因素都有一定的调节效果,其中草地单层群落结构的调节效果最差,郁闭度>0.6的乔灌草植物群落结构的调节效果最好。而草地单层植物群落结构在增加空气湿度方面效果明显。虽此,其与其他几种植物群落结构(除郁闭度>0.6的乔灌草植物群落结构和郁闭度0.2~0.4的乔灌草植物群落结构处)之间差别并不明显。 相似文献