Dong Hegan, Song Zhanli, Liu Tong, Liu Zhongquan, Liu Yan, Chen Baoxiong, Ma Qianqian, Li Zhigang
Xinjiang Production and Construction Corps Key Laboratory of Oasis Town and Mountain-basin System Ecology Shihezi University Shihezi China.
College of Life Science Shihezi University Shihezi China.
Ecol Evol. 2020 Oct 18;10(23):13122-13133. doi: 10.1002/ece3.6902. eCollection 2020 Dec.
and are two species of very harmful and invasive plants of the same genus. However, it remains unclear why is more widely distributed than worldwide. Distribution and abundance of these two species were surveyed and measured from 2010 to 2017 in the Yili Valley, Xinjiang, China. Soil temperature and humidity, main companion species, the biological characteristics in farmland ecotone, residential area, roadside and grassland, and water demand of the two species were determined and studied from 2017 to 2018. The area occupied by in the Yili Valley was more extensive than that of , while the abundance of in grassland was less than that of at eight years after invasion. The interspecific competitive ability of two species was stronger than those of companion species in farmland ecotone, residential, and roadside. In addition, had greater interspecific competitive ability than other plant species in grassland. The seed size and seed weight of were five times or eight times those of . When comparing the changes under simulated annual precipitation of 840 mm versus 280 mm, the seed yield per m of decreased from 50,185 to 19, while that of decreased from 15,579 to 530.
[植物名称1]和[植物名称2]是同一属的两种极具危害性的入侵植物。然而，目前尚不清楚为何[植物名称1]在全球范围内的分布比[植物名称2]更为广泛。2010年至2017年期间，对中国新疆伊犁河谷这两种植物的分布和丰度进行了调查和测量。2017年至2018年期间，测定并研究了土壤温度和湿度、主要伴生种、农田交错带、居民区、路边和草地的生物学特性以及这两种植物的需水量。在伊犁河谷，[植物名称1]所占面积比[植物名称2]更为广泛，而入侵八年后，[植物名称1]在草地中的丰度低于[植物名称2]。在农田交错带、居民区和路边，这两种植物的种间竞争能力强于伴生种。此外，在草地中，[植物名称1]的种间竞争能力比其他植物物种更强。[植物名称1]的种子大小和种子重量分别是[植物名称2]的五倍或八倍。当比较模拟年降水量840毫米与280毫米条件下的变化时，[植物名称1]每平方米的种子产量从50185粒降至19粒，而[植物名称2]则从15579粒降至530粒。
