共查询到20条相似文献,搜索用时 62 毫秒
1.
介绍了杭州湾海涂新区园林绿化的综合工程技术,改良盐碱土为生殖土壤,选择优良乡土树种,引种耐盐碱的绿化树种,实现了海涂新区绿化美化。 相似文献
2.
3.
杭州湾上虞新区由于土壤碱性重,含盐量高,绿化难度大.通过对新区内绿化树种的调查及物理改良、水利改良、化学改良、生物改良等绿地改良措施的应用试验,总结出杭州湾上虞新区的绿化技术.试验结果表明:女贞、洋白蜡、枣树、樱花、苦楝、桑树、椤木石楠、木槿、木芙蓉、龙爪槐、红叶李、意杨、乌桕等树种非常适应园区环境,喜树等树种也可在该地种植;绿地改良措施能明显地改善片林、林带树木的生长,对银杏、马褂木、枇杷的片林和广玉兰、雪松的林带改良中效果都较明显,物理改良对香樟、杜英、桂花效果明显,对林带中的茶梅、红花(楼)木、含笑、杜鹃有较大作用,化学改良对广玉兰效果明显. 相似文献
4.
随着平湖市滨海新城——独山港区的开发建设,绿化作为改善沿海地区生态环境最直接最有效的手段,迫切需要对新围海涂进行绿化造林。文章通过对滨海地区绿化现状调查研究,从土壤处理、树种选择、种植养护等3个方面总结出适合平湖市沿海盐碱地绿化造林的技术措施。 相似文献
5.
浙江省海涂绿化成果回顾及今后发展技术途径探讨 总被引:3,自引:1,他引:3
论述了浙江省新围涂涂资源的特点和绿化造林现状,肯定了海涂造林的树种选择,造林育苗技术及有关经验和成果,并探讨了新围海涂绿色屏障建立的技术途径。 相似文献
6.
宁波市沿海防护林协作组 《浙江林业科技》1985,(1)
宁波市地处杭州湾以南,三门湾以北的滨海地区。有六百多公里海岸线,四十多万亩海涂,开发利用潜力很大。但因常年受台风、干旱和冬季寒流的侵袭,给农业生产带来很大影响,因此,营造沿海防护林显得十分重要。为建设具有多样性的沿海防护林体系,发挥防护林的多种功能,我们从1981年开始进行树种选择试验,现将三年筛选结果作一报导。 相似文献
7.
8.
9.
济南地区地被植物的引种及其在园林中的应用 总被引:1,自引:0,他引:1
本文针对济南地区的气候条件,对70余种地被植物,经10年的引种筛选试验,总结出适合济南地区引种栽培的地被植物,以及从引种原则、引种驯化、引种试验等方面,形成一套成功的引种栽培技术。 相似文献
10.
对四季桂光合生理指标的研究表明:海涂盐碱土进行整地改良、灌水改良和施肥改良,对四季桂光合生理指标都有不同程度的影响。其中,整地改良和灌水改良对四季桂光合生理的影响与施肥改良之间存在差异,与对照之间差异性极显著;施肥改良与对照之间也存在差异;但灌水改良和施肥改良之间差异并不明显。 相似文献
11.
潮间带消浪林海滨木槿光合作用的初步研究 总被引:3,自引:0,他引:3
以慈溪杭州湾滨海绿地试验林场的海滨木槿为对照,对比分析了杭州湾南岸潮间带消浪林海滨木槿的光合作用日变化、光合作用光响应曲线以及叶绿素含量特征。结果表明,消浪林海滨木槿净光合速率Pn日变化与对照相同,均呈双峰曲线,但其平均值显著下降,仅为对照的76.02%;光响应曲线经非直角双曲线拟合得到,潮间带海滨木槿最大净光合速率Amax为(22.36±3.22)μmol.m-2.s-1,是对照的91.75%,而光补偿点LCP为(28.57±1.51)μmol.m-2.s-1和暗呼吸速率Rd(1.98±0.31)μmol.m-2.s-1却是对照的1.44倍和1.33倍,表观量子效率AQ Y与对照相差不大;消浪林海滨木槿叶绿素a、叶绿素b和叶绿素总含量分别为(0.82±0.04)g.kg-1(、0.12±0.00)g.kg-1和(0.94±0.04)g.kg-1,分别是对照的65.08%、100.00%和68.12%。方差分析结果表明,消浪林海滨木槿的Pn、Amax、LCP、Rd、叶绿素a含量、叶绿素总含量与对照间存在显著差异,其他指标差异不显著。 相似文献
12.
Phosphorus (P) in soil exists both in organic and inorganic forms and their relative abundance could determine P supplying capacity of soil. Differential input of exogenous and plant-mediated phosphorus and carbon in soil under different land-uses could influence P availability and fertilizer P management. While the effect of land-use on soil organic carbon (SOC) is fairly well-documented, its effect on soil P fractions is relatively less known. We investigated the effect of different land-uses including rice–wheat, maize–wheat, cotton–wheat cropping systems and poplar-based agroforestry systems on soil P fractions and organic carbon accrual in soils. Total P concentration was the highest under agroforestry (569 mg P kg?1) and the lowest under maize–wheat (449 mg P kg?1) cropping systems. On the contrary, soils under rice–wheat had significantly higher available P concentration than the agroforestry systems, probably because of higher fertilizer P application in rice–wheat and prevailing wetland conditions during rice growth. In soils under sole cropping systems viz. rice–wheat, maize–wheat and cotton–wheat, inorganic P was the dominant fraction and accounted for 92.2–94.6% of total P. However, the soils under agroforestry had smaller proportion (73%) of total P existing as inorganic P. Among soil P fractions, water soluble inorganic P (0.13–0.26%) represented the smallest proportion inorganic P in soils under different land-uses. Agroforestry showed significantly (p < 0.05) higher concentrations of SOC than the other land-uses. Soil organic C was significantly correlated with soil P fractions. It was concluded that poplar-based agroforestry systems besides leading to C accrual in soil result in build-up of organic P and the P supplying capacity of soil. 相似文献
13.
14.
W. Zhang P. Ahanbieke B. J. Wang W. L. Xu L. H. Li P. Christie L. Li 《Agroforestry Systems》2013,87(4):929-939
Even though agronomists have considered the spatial root distribution of plants to be important for interspecific interactions in agricultural intercropping, few experimental studies have quantified patterns of root distribution and their impacts on interspecific interactions in agroforestry systems. A field experiment was conducted to investigate the relationship between root distribution and interspecific interactions between intercropped jujube tree (Zizyphus jujuba Mill.) and wheat (Triticum aestivum Linn.) in Hetian, south Xinjiang province, northwest China. Roots were sampled by auger in 2-, 4- and 6-year-old jujube tree/wheat intercropping and in sole wheat and 2-, 4- and 6-year-old sole jujube down to 100 cm depth in the soil profile. The roots of both intercropped wheat and jujube had less root length density (RLD) at all soil depths than those of sole wheat and jujube trees. The RLD of 6-year-old jujube intercropped with wheat at different soil depths was influenced by intercropping to a smaller extent than in other jujube/wheat intercropping combinations. 6-year-old jujube exhibited a stronger negative effect on the productivity of wheat than did 2- or 4-year-old jujube and there was less effect on productivity of jujube in the 6-year-old system than in the 2- or 4-year-old jujube trees grown in monoculture. These findings may partly explain the interspecific competition effects in jujube tree/wheat agroforestry systems. 相似文献
15.
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
16.
影响城市绿化养护管理水平的几大因素 总被引:2,自引:0,他引:2
城市绿化养护管理是提高城市绿化水平的关键,通过对几个绿化养护水平不同的城市的比较,得出影响城市绿化养护管理水平的因素有土壤类别、气候、人口密度、引种行为、城市规划和经济等六大因素。 相似文献
17.
18.
各树种的生物学特性各不一致,对环境的适应性存有差异。为此,自1978年开始,有目的地对一些珍稀、优良用材树种在杭州地区不同类型立地上进行试种,了解各树种较适宜的环境条件,以期为不同立地选择栽培树种提供依据。 相似文献
19.
20.
不同改良利用模式对辽西北风沙土理化性质的影响 总被引:2,自引:0,他引:2
为了研究不同改良措施对辽西北风沙土理化性质的影响,选择了4种不同的改良利用模式作为研究对象,以流动风沙土作为对照,对不同模式下土壤的物理化学性质进行了测定分析。结果表明:风沙土经过各种措施改良后土壤的物理化学性质得到了很好的改善,风沙土三相比例更加趋于协调。不同利用模式对风沙土土壤养分的改善效果是阔叶树模式好于苜蓿改土模式,苜蓿改土模式好于灌木林模式,灌木林模式好于针叶树模式。各模式土壤的胡敏酸与富里酸的比值与流沙比较呈降低趋势,且HA/FA<1。 相似文献