尚白军, 朱家龙, 周智彬, 宋春武, 吴书普. 近30 年莫索湾垦区150团植被覆盖度时空变化及现状评价[J]. 云南大学学报(自然科学版), 2021, 43(2): 412-420. doi: 10.7540/j.ynu.20200391
引用本文: 尚白军, 朱家龙, 周智彬, 宋春武, 吴书普. 近30 年莫索湾垦区150团植被覆盖度时空变化及现状评价[J]. 云南大学学报(自然科学版), 2021, 43(2): 412-420. doi: 10.7540/j.ynu.20200391
SHANG Bai-jun, ZHU Jia-long, ZHOU Zhi-bin, SONG Chun-wu, WU Shu-pu. Spatio-temporal changes and current status evaluation of vegetation coverage in 150 Regiment of Mosuowan in recent 30 years[J]. Journal of Yunnan University: Natural Sciences Edition, 2021, 43(2): 412-420. DOI: 10.7540/j.ynu.20200391
Citation: SHANG Bai-jun, ZHU Jia-long, ZHOU Zhi-bin, SONG Chun-wu, WU Shu-pu. Spatio-temporal changes and current status evaluation of vegetation coverage in 150 Regiment of Mosuowan in recent 30 years[J]. Journal of Yunnan University: Natural Sciences Edition, 2021, 43(2): 412-420. DOI: 10.7540/j.ynu.20200391

近30 年莫索湾垦区150团植被覆盖度时空变化及现状评价

Spatio-temporal changes and current status evaluation of vegetation coverage in 150 Regiment of Mosuowan in recent 30 years

  • 摘要: 150团位于新疆石河子市莫索湾北端风积沙漠与荒漠交错地带,深入古尔班通古特沙漠70 km,沙漠化土地面积占团场可利用土地面积的12%. 研究该地区的植被覆盖度的时空变化趋势,对植被生长状况作出合理评价能够为研究区生态环境保护、防护林构建、植被长效可持续性提供科学指导. 以莫索湾垦区150团为研究对象,用改进的像元二分模型,结合团场土地利用类型,探究近30 a植被覆盖度的时空变化,并用防护林种植密度、郁闭度、疏透度和成活率对植被现状作了评价. 结果表明:①近30 a 150团低植被覆盖率面积减少了25.41%,中植被覆盖率面积增加了7.47%,高植被覆盖率面积增加了17.93%;重度退化的面积占0.81%,轻度退化的面积占31.58%,未发生变化的面积为1.63%,低度改善的面积占51.28%,高度改善的面积占14.69%. ②近30 a 150团北部地区植被出现退化,南部地区植被得到明显改善,植被整体向良性趋势发展. 可能的原因是团场南部地区人口集中,林带在一定程度上能得到城市中水的补给,且团场南部防护林受到的风沙危害较北部弱,故在相同自然条件下,南部地区植被比北部地区生长良好.

     

    Abstract: 150 Regiment is located in the aeolian desert and desert crisscrossed zone at the northern end of Mosuowan Shihezi City, Xinjiang, 70 km into Gurbantunggut Desert. Desertification land area accounts for 12% of the available land area. The study of the temporal and spatial variation trend of vegetation coverage and the reasonable evaluation of vegetation growth can provide scientific guidance for the ecological environment protection, shelter forest construction and long-term vegetation sustainability in the study area. In this paper, the spatial and temporal changes of vegetation coverage in the past 30 years of 150 Regiment were investigated by using the improved pixel dichotomous model combined with the land use types of the groups, and the vegetation status was evaluated with the planting density, canopy density, porosity and survival rate of the shelter forest. The results show that: ① In the past 30 years, the area with low vegetation coverage has decreased by 25.41%, that with medium vegetation coverage has increased by 7.47%, and that with high vegetation coverage has increased by 17.93%. The areas with severe degradation accounted for 0.81%, those with mild degradation accounted for 31.58%, those with no change accounted for 1.63%, those with mild improvement accounted for 51.28% and those with high improvement accounted for 14.69%. ② In the past 30 years, the overall vegetation of 150 Region has developed towards a good trend, with vegetation degradation in the northern region and significant improvement in the southern region. The possible reason is that the wind-sand hazards of shelterbelts in the southern region are weaker than those in the northern region, and the population in the southern region is more concentrated, the vegetation is closer to the human settlements, and the forest belt can be supplied by the water in the city. Therefore, under the same natural conditions, the vegetation in the southern region grows better than that in the northern region.

     

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