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不同土地利用方式对风沙土酶活性的影响 总被引:1,自引:0,他引:1
以辽宁省彰武县柳河流域忙海林子村为例,研究了不同土地利用方式对该区域风沙土6种酶活性的影响。结果表明:裸地由于几乎无植被覆盖,各类生物少,酶活性普遍处于最低水平,应采取措施改良;河滩地由于其特殊的地理位置,土壤易被河水冲刷,酶活性普遍处于较低水平,且由于耕种会影响泄洪,因此,河滩地不适合开垦为耕地;非河滩耕地酶活性基本处于中等水平,说明由于耕作、收割等,加剧了水土流失过程,降低了酶活性,可适度休耕;天然草地酶活性基本处于较高水平,说明天然草地可在一定程度上改善风沙土酶活性;林地酶活性普遍处于最高水平,说明种植杨树对改善风沙土酶活性效果最为明显。 相似文献
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By afforestation trial, the adaptation and growing states of 5 Banksia robur provenances in Jianfengling of Hainan were studied, and the effects of provenance and fertilizer treatment on the survival rate, height and ground diameter were analyzed. The results showed that all the 5 provenances had a good adaptability in Hainan province. 2 months after planting, the survival rate was 85%, but it was easily affected by air humidity and became lower in the dry season, especially the provenance No.38164, showing that the B. robur needs wet environment. The study also found that different provenances and fertilizer treatments had significant impact and interactions on the growth of B. robur. The provenance No.38163 had the fastest grow speed, with 1.35 mm of ground diameter increment and 10.57 cm of height increment during 3 months, while the provenance No.38164 had the lowest grow speed. The provenance No.39163 also had a strong barren resistance, while the provenances No.38177 and No.38199 needed well water and nutrient conditions. Different fertilizer treatments could enlarge the difference in growth status of the provenances, and the composted cattle manure had the best effect on promoting growth status, which could be used as the best fertilizer in afforestation. 相似文献
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广州城市公园森林植物景观美景度研究 总被引:1,自引:0,他引:1
为使城市整体质量提升,人居环境优美,以广州市越秀公园为研究对象,运用心理物理学派美景度测量与调查方法——美景度评价法,选取10 个代表性植物群落进行景观美学质量评价,运用多元线性回归建立景观美景度与植物群落结构间的数量化回归模型,解析影响植物景观美景度的关键因子。结果表明:榕树+木棉+彩叶灌木、棕榈类+地被等群落有较高的美景度得分值。影响植物景观美景度的关键要素有植物本身形态特征、草坪覆盖度、遮阴效果等。提高乡土乔木树种多样性和植物色彩丰富性,是改善城市公园森林植物景观的可行途径。 相似文献
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随着人们生活水平的提高,生态型园林在城市中越来越受欢迎。野花组合作为一种仿自然景观形式在园林绿化中得到越来越广泛的应用。挑选了风暴组合、宿根组合、缀花草坪、耐湿组合、红色系组合和自配组合6种野花组合进行露地播种试验,研究野花组合在广州地区的生长适应性,筛选出适宜广州地区的野花组合类型。结果表明:1号风暴组合和3号缀花草坪种子萌发与生长状况好,出苗种类多,整体出苗率也较高,对试验地适应良好。1号风暴组合和5号红色系组合的景观效果评价得分最高,花色丰富,花期较长。综合评价结果显示,在6个组合中,1号风暴组合生长状况和景观效果最好,适应广州地区的生态环境。此外,针对建植过程中存在的问题,对华南地区野花组合景观建植提出了相关建议。 相似文献
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