Study on the Adaptability of Introduced Lippia nodiflora in the Rock Desertifation Area in Chongqing

With intensifying of karst rock desertification in Southwest China, the techniques and modes about taming of karst rock desertification are increasingly rich. But some methods and technologies were hard to transplant. According to the concrete conditions of karst rock desertification in Chongqing, Lippia nodiflora(L.) Greene was introduced as a kind of pioneer plant. By way of the cultivation of introduced practice in Nanchuan District and Wushan County, the phenophase, growth rate and resistibility of Lippia nodiflora were tested. The results show that Lippia nodiflora was suitable for being promoted in karst rock desertification areas, for it’s rapid growth, drought-relief, low death rate and adaptability to calcium in soil.

岩垂草在重庆石漠化地区的引种适应性研究

我国西南岩溶区石漠化问题日益加剧,同时石漠化治理的技术和模式也逐渐丰富,但这些方法与技术专属性较强,难以移植。针对重庆石漠化地区的具体情况,选择引种岩垂草作为一种先锋植物,通过在重庆南川区和巫山县石漠化地区的引种栽培试验,对岩垂草的物候期、生长速度、抗逆性进行观测。结果表明,岩垂草生长迅速,抗旱力强,死亡率低,对钙有适应性,适宜在石漠化地区推广。

5个品种岩垂草引种试验研究

对引进的5个品种的岩垂草和本地品种过江藤从物候期、覆盖面积及生物量进行了生长对比试验研究。结果表明,5个品种岩垂草的覆盖面积与生物量均极显著大于本地品种过江藤。其中,4号和2号品种覆盖面积远大于其它品种,而地下部分生物量占总生物量的比例最高的两个也为4号和2号,该两个品种岩垂草是石漠化治理和保水固土的理想材料。