【作者】 王波；

【导师】 王建光； 那平山；

【作者基本信息】 内蒙古农业大学 ， 草业科学， 2006， 硕士

【摘要】 本文主要从苗源、苗木水分、苗木质量、独特的环境条件及苗木越冬防护措施等5个方面对呼包高速公路中央隔离带绿化苗木——桧柏成活性能进行了研究,试验结果表明:河北定州桧柏苗木不能适应呼包高速公路独特而严酷的环境,成活率低于46.65%;呼包两地苗木适应能力强,成活率达到90%以上。因此,为了其提高桧柏苗木的成活率,应尽可能优先选取本地乡土苗木。在影响桧柏苗木成活各因子中,水分因子起主导作用,失水是造成苗木死亡根本原因。苗木自出圃起,就面临着失水死亡的危险。研究表明:桧柏苗木在裸根情况下,必须在3⁴d苗木水分极限生存时间内完成栽植且浇透第一遍水。而在有完好土坨的条件下,桧柏苗木的根系活力,在无外界水分补给的条件下,能够维持26d。在26d之内,必须给予适量的水分补充,以维系桧柏苗木的生存需要。长期处在高速公路上,行车会对桧柏苗木,特别是刚栽植桧柏苗木的生理代谢（净光合速率与蒸腾速率）生长发育造成严重的影响,甚至危及桧柏苗木的成活。因此,对于刚栽植的桧柏苗木,应给予适当的防风措施,提高苗木的成活。在我国北方寒冷地区,桧柏栽植第一年的冬季,必须对苗木进行越冬防护,尤其是外来桧柏苗木。研究结果表明:用草帘覆盖是最佳的防护方案,而塑料薄膜,绝不能用于绿化植物越冬防护。此外,在今后桧柏苗木抚育管理过程中,应加强水分管理。在实际工作中,依据当地气象资料与植物的各个物候期需水状况,利用公式:“ΔW=∑W_收入-∑W_支出=P+J-E-Tr”,来计算当月的绿化苗木水分盈余状况及植物需水量,进行科学、定量浇水。更多还原

【Abstract】 Study on the surviving performance of Sabina chinensis seedling planting on central separation belt of the Hu-Bao Highway, including seedling producing areas, water, seedling quanlity, environment condition and protecting measures.The results showed that:Dingzhou seedling could not easily adapt to the environment condition of Hu-Bao highway, the surviving rate was less than 46.65%, and the seedlings of Hu-Bao area could adapt that, its surviving rate was above 90%. In order to increase seedling surviving rate, native seedling should be firstly choosen.Water was the most important among these limiting factors. Water loss was the essential reason to Sabina chinensis seedling. Once seedlings left the soil, they were in danger to die. The study showed that seedling had to accomplish planting and irrigating for naked roots’seedlings in 3~4d. Moreover, protected by the whole root soil ball, root vigor could be maintained 26d without water supplied. So it was essential for supplied water to maintain seedlings living in 26d.In the long term, especially just planting seedling, cars speed at highway led gravely negative effect to the growth of Sabina chinensis seedling, even to living.In northern China, the planted seedlings used straw shade to prevent from severe winter, which was the best measure, plastic membrane was forbidden.It was necessary to pay more attention to the water manager. It could be use the function“ΔW=P+J-E-Tr”to accumulate the profit and loss of water , so that we could scientific, ration irrigation.更多还原