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塔里木盆地北缘绿洲-荒漠过渡带典型植物地上生物量估测

张殿岱1,王雪梅1,2*   

  1. 1新疆师范大学地理科学与旅游学院, 乌鲁木齐 830054;2新疆维吾尔自治区重点实验室(新疆干旱区湖泊环境与资源实验室),乌鲁木齐 830054)
  • 出版日期:2019-10-10 发布日期:2019-10-10

Estimating aboveground biomass of typical plant species in the oasis-desert transition zone of northern Tarim Basin.

ZHANG Dian-dai1, WANG Xue-mei1,2   

  1. (1College of Geography Science and Tourism, Xinjiang Normal University, Urumqi 830054, China; 2Xinjiang Uygur Autonomous Region Key Laboratory “Xinjiang Laboratory of Lake Environment and Resources in Arid Zone”, Urumqi 830054, China).
  • Online:2019-10-10 Published:2019-10-10

摘要: 以塔里木盆地北缘绿洲-荒漠过渡带中的典型植物柽柳(Tamarix ramosissima)、盐节木(Halocnemum strobilaceum)、盐穗木(Halostachys caspica)和芦苇(Phragmites australis)为研究对象,依据野外调查数据,采用典型植物的冠幅和株高等单一因子及其派生因子为自变量,构建典型植物地上生物量的估测模型,并对模型的拟合效果进行精度验证。结果表明:柽柳、盐节木和盐穗木的冠幅与株高相比,对其地上生物量的影响更大,芦苇则相反;复合变量相对于单一变量而言,其地上生物量具有更高的相关性(P<0.01);柽柳、盐节木和盐穗木的地上生物量最优模型均为S型曲线模型,芦苇的地上生物量最优模型为三次曲线模型,拟合指数(R2)分别为0.591、0.623、0.754和0.640;估测模型的回归效果均达到极显著(P<0.001)。构建典型植物的地上生物量估测模型,对准确估算塔里木盆地北缘荒漠生态系统的地上生物量具有重要的现实意义,同时可为其他荒漠植物生物量的估算以及塔里木盆地北缘土地荒漠化的治理和碳储量研究提供理论参考。

关键词: 稻鸭共生, 有机农业, 农药残留, 黄河三角洲, 稻米品质, 水稻

Abstract: The typical plant species of Tamarix ramosissima,Halocnemum strobilaceum, Halostachys caspica, and Phragmites australisin the oasisdesert transitional zone in the northern margin of Tarim Basin were the objects of this study. According to field survey data, models for estimating aboveground biomass of the four plant species were constructed using single factors, such as crown width and plant height, and their derivative factors as independent variables. After that, the accuracy of the models was verified. Compared with plant height, crown width of Tamarix ramosissima, Halocnemum strobilaceum, and Halostachys caspica had greater effects on aboveground biomass, while plant height of Phragmites australis had a greater effect on aboveground biomass. The correlation of compound variables to aboveground biomass was higher than that of single variables (P<0.01). The optimal models of aboveground biomass of Tamarix ramosissima, Halocnemum strobilaceum, and Halostachys caspica were S-curve models, and the optimal model of aboveground biomass of Phragmites australis was cubic curve model, with the value of R2 being 0.591, 0.623, 0.754 and 0.640, respectively. The regression effects of the estimated models were extremely significant (P<0.001). Estimating aboveground biomass of desert ecosystems in the northern margin of Tarim Basin by constructing the prediction model of aboveground biomass of typical plants is important, which could provide a theoretical reference for biomass estimation of other desert plant species, the control of land desertification and the study of carbon storage in the northern margin of Tarim Basin.

Key words: pesticide residue., Yellow River Delta, rice-duck mutualism, organic agriculture, rice, rice quality