干旱地区农业研究
榦旱地區農業研究
간한지구농업연구
AGRICULTURAL RESEARCH IN THE ARID AREAS
2015年
1期
98-104
,共7页
魏光辉%马亮%马英杰%董新光
魏光輝%馬亮%馬英傑%董新光
위광휘%마량%마영걸%동신광
枣树%耗水量%温度%土壤含水率%太阳辐射%偏最小二乘回归%灰色关联分析%干旱区
棘樹%耗水量%溫度%土壤含水率%太暘輻射%偏最小二乘迴歸%灰色關聯分析%榦旱區
조수%모수량%온도%토양함수솔%태양복사%편최소이승회귀%회색관련분석%간한구
jujube tree%water consumption%temperature%soil moisture%solar radiation%PLSR%grey relational analysis%arid area
以新疆阿克苏地区成龄枣树为研究对象,以日均气温(x1)、日均相对湿度(x2)、日均风速(x3)、日太阳辐射总量(x4)、日均大气压(x5)、0~100 cm土壤日均含水率(x6)及0~20 cm土壤日均温度(x7)为模型影响因子,采用偏最小二乘回归法建立了枣树耗水量预测模型,在此基础上运用缺省因子法分析了枣树耗水量对各因子的敏感性,并采用灰色关联分析法加以验证。结果表明:偏最小二乘回归模型(PLSR )具有较高的模拟精度(相关系数 r=0.9789),不仅能够定量预测枣树耗水量(平均相对误差为6.40%),而且能够从机理上解释各因素对耗水量的影响;枣树耗水量对太阳辐射能量、土壤含水率和温度这3因素最为敏感(敏感性指数分别为3.24、2.18和2.09);基于缺省因子法的枣树耗水敏感因素排序(x4> x1> x6> x3> x7> x2> x5)与灰色关联分析计算结果(x4> x1> x6>x3> x7> x5> x2)基本一致,尤其在主要影响因素的判别上是完全一致的。
以新疆阿剋囌地區成齡棘樹為研究對象,以日均氣溫(x1)、日均相對濕度(x2)、日均風速(x3)、日太暘輻射總量(x4)、日均大氣壓(x5)、0~100 cm土壤日均含水率(x6)及0~20 cm土壤日均溫度(x7)為模型影響因子,採用偏最小二乘迴歸法建立瞭棘樹耗水量預測模型,在此基礎上運用缺省因子法分析瞭棘樹耗水量對各因子的敏感性,併採用灰色關聯分析法加以驗證。結果錶明:偏最小二乘迴歸模型(PLSR )具有較高的模擬精度(相關繫數 r=0.9789),不僅能夠定量預測棘樹耗水量(平均相對誤差為6.40%),而且能夠從機理上解釋各因素對耗水量的影響;棘樹耗水量對太暘輻射能量、土壤含水率和溫度這3因素最為敏感(敏感性指數分彆為3.24、2.18和2.09);基于缺省因子法的棘樹耗水敏感因素排序(x4> x1> x6> x3> x7> x2> x5)與灰色關聯分析計算結果(x4> x1> x6>x3> x7> x5> x2)基本一緻,尤其在主要影響因素的判彆上是完全一緻的。
이신강아극소지구성령조수위연구대상,이일균기온(x1)、일균상대습도(x2)、일균풍속(x3)、일태양복사총량(x4)、일균대기압(x5)、0~100 cm토양일균함수솔(x6)급0~20 cm토양일균온도(x7)위모형영향인자,채용편최소이승회귀법건립료조수모수량예측모형,재차기출상운용결성인자법분석료조수모수량대각인자적민감성,병채용회색관련분석법가이험증。결과표명:편최소이승회귀모형(PLSR )구유교고적모의정도(상관계수 r=0.9789),불부능구정량예측조수모수량(평균상대오차위6.40%),이차능구종궤리상해석각인소대모수량적영향;조수모수량대태양복사능량、토양함수솔화온도저3인소최위민감(민감성지수분별위3.24、2.18화2.09);기우결성인자법적조수모수민감인소배서(x4> x1> x6> x3> x7> x2> x5)여회색관련분석계산결과(x4> x1> x6>x3> x7> x5> x2)기본일치,우기재주요영향인소적판별상시완전일치적。
Taking the mature jujube tree in Akesu ,Xinjiang as the research object ,the average daily temperature (x1) ,relative humidity(x2) ,wind speed(x3) ,solar radiation(x4) ,atmospheric pressure(x5) ,soil moisture content in 0~100 cm(x6) and soil temperature in 0~20 cm(x7) as the model influnce factors ,has established the water con-sumption forecast model by using the PLSR method .On the basis of default factor method ,has analyzed the sensitivity of water comsuption to each factor ,furthermore using the gray relational analysis method to test and verify .The results showed that:The PLSR model had rather high accuracy (correlation coefficient r=0 .9789 ) ,not only quantitative fore-cast the water consumption of jujube tree (average relative error was 6 .4% ) ,but also explain the impact of each factor on water consumption through mechanism .The three factors as solar radiation ,soil moisture and temperature were the most sensitive factors on water consumption of jujube (sensitivity index were 3 .24 ,2 .18 and 2 .09 ,respectively ) .Based on the default factor method ,has sequenced the sensitive factors as ( x4> x1> x6> x3> x7> x2> x5 ) almost agreement with the calculated results by the grey relational analysis as(x4> x1> x6> x3> x7> x5> x2 ) ,especially the main in-fluence factors were completely consistent .