还林还草工程后榆林市NDVI时空变化趋势

生态学杂志

还林还草工程后榆林市NDVI时空变化趋势

杨波^1,2,王全九^2*,许晓婷¹,周佩¹,雷景森¹,王艳³,郭勇⁴

(¹咸阳师范学院资源环境与历史文化学院，陕西咸阳 712000；²西安理工大学水利水电学院，西安 710048；³陕西省榆林市榆阳区农业技术推广中心，陕西榆林 719000；⁴陕西省榆林市水保所，陕西榆林 719000)

出版日期:2019-06-10 发布日期:2019-06-10

NDVI spatiotemporal variation in Yulin after grain for green project.

YANG Bo^1,2, WANG Quan-jiu^2*, XU Xiao-ting¹, ZHOU Pei¹, LEI Jing-sen¹, WANG Yan³, GUO Yong⁴

(¹Institute of Natural Resources and Environment and Historical Culture, Xianyang Normal University, Xianyang 712000, Shaanxi, China; ²Institute of Water Resources and Hydroelectric Engineering of Xi’an University of Technology, Xi’an 710048, China; ³Yuyang District Agricultural Technology Extension Center, Yulin 719000, Shaanxi, China; ⁴Yulin Water Conservation Institute, Yulin 719000, Shaanxi, China).

Online:2019-06-10 Published:2019-06-10

摘要/Abstract

摘要： 还林还草工程实施以来，黄土高原植被得到了有效恢复。为了研究黄土高原地区的植被变化特征和未来发展趋势，利用趋势分析、标准差分析、Hurst指数等方法对榆林市2000—2017年MODIS NDVI（Normalized Difference Vegetation Index）进行了分析。结果表明：18年来榆林市NDVI累计增长88.56%，年均增长率为4.92%；耕地、林地、草地和沙化土地上的NDVI均明显增加；随着时间的推移，不同高程和坡度下的NDVI增长迅速；NDVI和降水表现出显著正向相关；农产品在产量、牛羊存栏数、还林还草总面积与NDVI呈显著正相关，表明农业生产转型升级后，生态环境治理和农村经济达到了协调发展。Hurst指数预测结果表明，该地区目前还林还草工程已接近其承载潜力，但NDVI还有约10%的增长潜力，在未来极度干旱的年份，植被有干旱致死的威胁，NDVI存在减少的风险，主要集中在目前NDVI恢复较好的丘陵沟壑地区。在后退耕还林时代，水土资源的合理配置与植被建设相协调是实现该地区生态建设的重要任务。

关键词: 东南太平洋, 延绳钓, 兼捕, 垂直分布

Abstract: Since the start of returning cropland to forest and grassland project, vegetation in the Loess Plateau has grown rapidly. To clarify the vegetation variation and change trends in this region, trend analysis, standard deviation analysis, and Hurst index were applied to analyze the MODIS 250 m resolution NDVI in Yulin from 2000 to 2017. The NDVI was increased by 88.56% from 2000 to 2017, with an annual rate of 4.92%. The NDVI of cultivated land, woodland, grassland and unused land were all obviously increased. The NDVI in different elevations and slope ranges also increased significantly. NDVI was positively correlated with rainfall but not with temperature. Increased grain yield, the total number of domestic animals, and the total area of returning cropland to forest and grassland had a significant correlation with NDVI, suggesting that after the transformation and upgrading of agricultural production, ecological environment governance and rural economy had achieved coordinated development. According to the forecast results of Hurst index, the returning cropland to forest and grassland project in this area was close to its carrying potential, but NDVI index had about 10% growth potential. In the extreme drought years of future, vegetation would experience the threat of droughtinduced death and the risk of NDVI index reduction, mainly concentrated in the hilly and gully areas with better NDVI recovery. In the period of after returning cropland to forest and grassland, it is an important task to coordinate the rational allocation of soil and water resources for realizing ecological construction in this area.

Key words: southeast Pacific, longline, bycatch, vertical distribution.

杨波,王全九,许晓婷,周佩,雷景森,王艳,郭勇. 还林还草工程后榆林市NDVI时空变化趋势[J]. 生态学杂志.

YANG Bo, WANG Quan-jiu, XU Xiao-ting, ZHOU Pei, LEI Jing-sen, WANG Yan, GUO Yong. NDVI spatiotemporal variation in Yulin after grain for green project.[J]. cje.

[1]	薛现光,方光宏,邹楚钧,朱德平,肖利娟,彭亮. 大沙河水库拟柱孢藻昼夜垂直分布特征 [J]. 生态学杂志, 2020, 39(7): 2348-2355.
[2]	李艳琼,黄玉清,徐广平,孙英杰,张中峰,何成新,黄科朝,何文. 桂林会仙喀斯特湿地芦苇群落土壤养分及微生物活性 [J]. 生态学杂志, 2018, 37(1): 64-74.
[3]	孟国欣,查同刚*,张晓霞,张志强,朱聿申,周娅,刘怡函,林珠. 植被类型和地形对黄土区退耕地土壤有机碳垂直分布的影响 [J]. 生态学杂志, 2017, 36(9): 2447-2454.
[4]	韩旭1,2,李雪华1,3*,刘思洋1,2,贾美玉4,苗纯萍1. 典型沙生植物烛台虫实根系形态特征对沙丘微生境的响应 [J]. 生态学杂志, 2017, 36(6): 1524-1530.
[5]	张雪松1*,刘雅各2,胡正华1, 3,柳艺博1,张富存1,韩小梅1. 生态模型在农田蒸散及土壤水分模拟中的适用性评价 [J]. 生态学杂志, 2017, 36(1): 267-276.
[6]	王克林1,2,黄月1,孙学凯1,曾德慧1*. 辽北地区杨树-玉米间作对土壤水分和养分含量的影响 [J]. 生态学杂志, 2016, 35(9): 2386-2392.
[7]	马坤，张颖，唐素贤，刘俊国. 若尔盖高寒湿地土壤全氮空间分布特征 [J]. 生态学杂志, 2016, 35(8): 1988-1995.
[8]	化成君1,张衡1**,伍玉梅1,范秀梅1,叶守建2,徐良琦2. 中东太平洋金枪鱼延绳钓中心渔场的时空变化 [J]. 生态学杂志, 2014, 33(5): 1243-1247.
[9]	张大治1**,赵娜2,李岳诚2,马艳1,王旭1,解嘉成1,马成丽1,陈红彬1. 宁夏宁东地区沙蒿金叶甲种群动态及其影响因子 [J]. 生态学杂志, 2014, 33(2): 346-351.
[10]	于莹1,2,张武昌1**,丰美萍1,2,李海波1,2,赵苑1,肖天1. 海洋浮游纤毛虫在世界海区的时空分布 [J]. 生态学杂志, 2013, 32(4): 1045-1053.
[11]	漆良华1,杜满义1,范少辉1**,岳祥华1,艾文胜2,孟勇2,杨明2. 湘中丘陵区毛竹纯林、竹杉混交林土壤有机碳库动态 [J]. 生态学杂志, 2012, 31(12): 3038-3043.
[12]	苗进1,武予清1**,巩中军1,朱昆2,段云1,蒋月丽1,李彤1. 麦红吸浆虫成虫田间垂直分布及扩散 [J]. 生态学杂志, 2012, 31(11): 2855-2858.
[13]	战丽莉1,2,许艳丽1**,张兴义1,潘凤娟1,裴希超3,刘振宇4. 耕作方式对中小型土壤动物多样性影响 [J]. 生态学杂志, 2012, 31(09): 2371-2377.
[14]	李根柱.王贺新**,陈英敏,张自川,乌凤章,韩慧. 长白山落叶松林下笃斯越桔群落生物量的空间分布 [J]. 生态学杂志, 2012, 31(06): 1404-1410.
[15]	. 不同退化阶段高寒草甸土壤化学计量特征 [J]. 生态学杂志, 2012, 31(02): 254-260.