摘要
利用2000—2018年海南岛橡胶种植区18个市县19 a净初级生产力(NPP)值,通过年际变化、统计对比、空间分布、一元线性回归分析、P值检验等方法,结合同时期气象数据,分析了海南岛NPP的时空变化规律及其与气候因子的关系,研究了海南岛橡胶种植区气候NPP演变规律,明确气候因子对海南岛生物量积累过程的影响,结果表明:(1)19 a里海南岛NPP最高值在万宁出现次数最多,为7次,琼中和昌江各3次,儋州2次;19 a来NPP变化呈波动增加的趋势,19 a年平均值为16.33 t·hm^(-2),2000—2018年NPP年平均值变化范围为13.53—17.70 t·hm^(-2),线性倾向率为0.04 t·hm^(-2)·a^(-1),其中最高年平均值17.89 t·hm^(-2)出现在2009年,最低年平均值13.52 t·hm^(-2)出现在2004年;(3)从海南岛2000—2018年平均NPP分布上看,可分为强、中等、一般、弱4个等级区。其中琼海全境,万宁、琼中、屯昌大部,定安南半部、文昌东南角、保亭中部的净初级生产力属于最高等级区,东方从东部山区向西部海边净初级生产力逐步降低,为最弱等级区;(4)海南岛2000—2018年各市县NPP年值线性倾向率,儋州、万宁、澄迈、临高、海口、保亭、琼海、陵水、定安等9个市县呈微弱增加趋势;东方、文昌、乐东、五指山、三亚、昌江、白沙、琼中、屯昌等9个市县呈微弱下降趋势;(5)海南岛NPP值跟降水呈显著正相关(P<0.001),而与温度、日照无显著相关(P>0.2),风速与NPP相关性分析,呈负相关,没有统计学意义(P>0.2)。
Based on the net primary productivity(NPP)and meteorological data of 18 cities in Hainan Island from 2000 to 2018,the temporal and spatial variation of NPP in Hainan Island and its relationship with climate factors were analyzed in detail.Several statistical methods,including interannual variation,statistical comparison,spatial distribution,unitary linear regression analysis and p-value test,were employed to sever our studying goals.By studying the evolution of climate net primary productivity(NPP)in Hainan Island rubber planting area,the effects of climate factors on biomass accumulation in Hainan Island were clarified.The study indicated that the past 19 years could be classified into five aspects as followed:(1)the highest values of NPP appeared 7 times in Wanningand that for Qiongzhong,Changjiang and Danzhou were 3,3 and 2 times.(2)The annual average of NPP ranged from 13.53 to 17.70 t·hm^(-2)with the average value was 16.33 t·hm^(-2).On the whole,the evolution of NPP showed an increasing trend with a linear trend rate of 0.04 t·hm^(-2)·a^(-1).NPP values of total 12 years out of 19 were larger than the average value;in addition,the largest and smallest peak value of 17.89 t·hm^(-2)and 13.52 t·hm^(-2)occurred in 2009 and 2004,respectively.(3)The spatial distribution of NPP could be divided into four categories of strong,medium,general and weak ones.The first category included Qionghai,Wanning,Qiongzhong,most part of Tunchang,the South half of Ding'an,the southeast corner of Wenchang and the middle part of Baoting.Dongfang located in the fouth category,however,its values of NPP of Dongfang decreased gradually from the eastern mountainous region to the western coastal zone.(4)From 2000 to 2018,the linear trend rate of NPP annual value showed a weak increasing trend in Danzhou,Wanning,Chengmai,linggao,Haikou,Baoting,Qionghai,Lingshui and Ding'an,and a weak decreasing trend in Dongfang,Wenchang,Ledong,Wuzhishan,Sanya,Changjiang,Baisha,Qiongzhong and Tunchang.(5)There was a significantly positive correlation between NPP and precipitation in Hainan Island(P<0.001);however,it did not show a significant correlation with temperature and sunshine(P>0.2).A negative correlation was found with wind speed(P>0.2).
作者
甘业星
佟金鹤
田光辉
GAN Yexing;TONG Jinhe;TIAN Guanghui(Hainan Institute of Meteorological Sciences,Haikou 570203,China;Hainan Nanhai Key Laboratory of disaster prevention and reduction,Haikou 570203,China)
出处
《生态科学》
CSCD
2023年第2期164-171,共8页
Ecological Science
基金
国家自然科学基金(41765007,41465005,41675113)
海南省基础与应用基础研究计划(自然科学领域)高层次人才项目(2019RC359)
海南省气象局业务支撑类重点项目(HNQXZD201409)。
作者简介
甘业星(1982—),男,海南海口人,本科,工程师,主要从事生态气候、强对流天气、海洋气象研究,E-mail:184401690@qq.com;通信作者:佟金鹤,女,硕士,工程师,主要从事橡胶气象服务研究,E-mail:tongjinheby@163.com。
