天山北坡4种典型草原植物叶干重与叶面积的关系

发布时间：2018-01-09 23:06

本文关键词：天山北坡4种典型草原植物叶干重与叶面积的关系　出处：《新疆农业科学》2016年12期 　论文类型：期刊论文

【摘要】：【目的】研究4种典型草原植物冷蒿(Artemisia frigida)、针茅(Stipa capillata)、羊茅(Festuca ovina)和短柱苔草(Carex turkestanica)的叶片干重与叶片面积之间的关系,找到快速测定草原植物叶面积的方法,为大范围遥感监测及估产提供理论依据。【方法】以天山北坡中段山地草原4种典型植物为材料,以叶片干重和叶片面积作为测量指标,建立4种植物叶片干重与叶片面积的回归方程。【结果】冷蒿的回归方程为:Y=0.00849 X+0.002 7(R2=0.880 81);针茅为:Y=0.007 03 X+0.004 38(R2=0.750 14);羊茅为Y=0.015 38 X-0.001 25(R2=0.677 27);短柱苔草为:Y=0.007 05 X+0.008 895(R2=0.498 58)(P0.01)。【结论】4种植物的回归方程对叶面积的预测准确性表现为冷蒿针茅羊茅短柱苔草。可通过叶干重与叶面积建立回归方程并且为4种典型草原植物的叶面积测定提供科学参考。
[Abstract]:[objective] to study four typical grassland plants, Artemisia frigida, Stipa capillata. Relationship between leaf dry weight and leaf area of Festuca ovina and Carex turkestanica. To find a rapid method to determine the leaf area of grassland plants and to provide a theoretical basis for monitoring and estimating the yield of grasslands on a large scale. [methods] four typical plants in the middle part of the northern slope of Tianshan Mountain were used as materials. The leaf dry weight and leaf area were taken as the measurement index. The regression equations of leaf dry weight and leaf area of four species of plants were established. [results] the regression equation of Artemisia frigida was: 1: Y0. 00849 X 0. 0027 R2 + 0.88081; Festuca chinensis is 0. 75014, 0. 007 03 X 0. 004 38. Fescue is Yang 0.015 38 X-0.001 25 Con R2O 0.677 27; The species of Carex spp. Is: YTO 0.007 05 X 0.008 895N R2O0. 498 58C P0.01). [conclusion] the accuracy of regression equation for prediction of leaf area of four species of plants is as follows: Artemisia coliformis, Festuca arundinacea, Festuca spp., which can be used to establish regression equation by leaf dry weight and leaf area, and to measure leaf area of four typical grassland plants. It is certain to provide scientific reference.
【作者单位】：新疆农业大学草业与环境科学学院/新疆草地资源与生态重点实验室;新疆畜牧科学院草业研究所;
【基金】：国家自然科学基金项目(31460625) 高分辨率对地观测系统重大专项“新疆草地资源环境高分载荷遥感监测评价子系统”(95-Y40B02-9001-13/15-02)~~
【分类号】：S812
【正文快照】： 0引言【研究意义】植物作为生态系统中的重要组成成分,其生长状况可以通过叶面积得到体现。叶片是植物与外界环境进行光合作用和蒸腾作用的主要器官,其面积的大小直接影响植物的受光,对植物的生长发育、抗逆性及作物产量的影响很大,是植物遗传育种、栽培等方面经常要考虑到的

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