水氮耦合桶栽枣树冠层光分布与叶面积指数关系
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摘要
以阿克苏地区红旗坡农场新疆农业大学基地桶栽枣树为研究对象,运用HemiView数字植物冠层分析系统,研究枣树3种不同灌溉量(W1,20mm;W2,30mm;W3,40mm)和4个施氮水平(N1,标准施氮肥量60%;N2,标准施氮肥量80%;N3,标准施氮肥量100%;N4,标准施氮肥量120%)共计6个处理下光分布与叶面积指数(LAI)的相关关系,并建立冠层光参数与LAI的回归模型。结果表明:枣树在生育期内透光率、直射光立地系数(DSF)及散射光立地系数(ISF)总体呈现先减小后增大的趋势且变化基本一致。在生育前期不同处理叶面积指数差异不显著,生育中期至生育后期差异显著,生育期内变化呈先增大后减小的变化规律,与冠层光参数呈相反的变化趋势,不同水氮耦合DSF、ISF与LAI符合多元线性回归模型,其调整后决定系数较高,R~2>0.916。
Taking jujube tree planted in barrel at the base of Xinjiang Agricultural University of Hongqipo Farm in Aksu area as research object,the correlation between light distribution and leaf area index(LAI)under 6 treatments of three different irrigations volume(W1,20 mm;W2,30 mm;W3,40 mm)and four nitrogen levels(N1,standard nitrogen application rate 60%;N2,standard nitrogen application rate 80%;N3,standard nitrogen application rate 100%;N4,standard nitrogen application rate 120%)were studied by used HemiView digital plant canopy analysis system.The regression model of canopy light parameters and LAI was established.The results showed that the transmittance,direct light site coefficient(DSF)and scattered light site coefficient(ISF)of jujube trees decreased at first and then increased during the growth period.There was no significant difference in leaf area index among different treatments in the early growth stage.The variation of leaf area index between the middle growth stage and the later growth stage was obviously increased and then decreased,which was opposite to the canopy light parameters.The DSF,ISF and LAI of different water and nitrogen coupling were fitted with multiple linear regression model,and the adjusted decision coefficient was higher(R~2>0.916).
Taking jujube tree planted in barrel at the base of Xinjiang Agricultural University of Hongqipo Farm in Aksu area as research object,the correlation between light distribution and leaf area index(LAI)under 6 treatments of three different irrigations volume(W1,20 mm;W2,30 mm;W3,40 mm)and four nitrogen levels(N1,standard nitrogen application rate 60%;N2,standard nitrogen application rate 80%;N3,standard nitrogen application rate 100%;N4,standard nitrogen application rate 120%)were studied by used HemiView digital plant canopy analysis system.The regression model of canopy light parameters and LAI was established.The results showed that the transmittance,direct light site coefficient(DSF)and scattered light site coefficient(ISF)of jujube trees decreased at first and then increased during the growth period.There was no significant difference in leaf area index among different treatments in the early growth stage.The variation of leaf area index between the middle growth stage and the later growth stage was obviously increased and then decreased,which was opposite to the canopy light parameters.The DSF,ISF and LAI of different water and nitrogen coupling were fitted with multiple linear regression model,and the adjusted decision coefficient was higher(R~2>0.916).
引文
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[23]温一博,范文义,常颖.林冠层结构参数自动测量系统设计与试验[J].农业机械学报,2015(11):302-308.
[24]马泽清,刘琪璟,曾慧卿,等.南方人工林叶面积指数的摄影测量[J].生态学报,2008,28(5):1971-1980.
[25]李丹,赵经华,洪明,等.梨树冠层光分布特性与叶面积指数关系的研究[J].水资源与水工程学报,2015(3):227-230.
[2]COBLE A P,CAVALERI M A.Light drives vertical gradients of leaf morphology in a sugar maple(Acer saccharum)forest[J].Tree Physiology,2014,34(2):146-158.
[3]GRUBB P J,BELLINGHAM P J,KOHYAMA T S.Disturbance regimes,gap-demanding trees and seed mass related to tree height in warm temperate rain forests worldwide[J].Biological Reviews,2013,88(3):701-744.
[4]CHEN M,ZHU J J,YAN Q L,et al.Comparison of light characteristics in different size gaps in eastern-Liaoning montane secondary forests[J].Chinese Journal of Applied Ecology,2008,19(12):2555-2560.
[5]CHEN M,ZHANG Y J.Comparison of microclimate within different size gaps at initially growing season:A case observation in gaps of secondary forest ecosystem at eastern montane regions of Liaoning Province[J].Inner Mongolia Agricultural Science and Technology,2011(3):78-82.
[6]李丹,赵经华,洪明,等.不同种类果树冠层特性比较[J].北方园艺,2015(16):40-43.
[7]班宏娜.樟子松人工林冠层光分布规律及对生长影响的研究[D].哈尔滨:东北林业大学,2010.
[8]李德志,臧润国.森林冠层结构与功能及其时空变化研究进展[J].世界林业研究,2004(3):12-16.
[9]陈圣宾,宋爱琴,李振基.森林幼苗更新对光环境异质性的响应研究进展[J].应用生态学报,2005(2):365-370.
[10]贺庆棠,刘诈昌.森林热量平衡[J].林业科学,1980,16(1):24-33.
[11]洪启法,王仪洲,吴淑贞,等.马尾松幼林小气候[J].林业科学,1963,8(4):275-289.
[12]刘家冈,张文杰.光在林冠中的传播[J].林业科学,1985,21(3):234-240.
[13]王天铎.水稻群体光的光强分布与光合作用的模型[C].上海:上海科技出版社,1961.
[14]WEST P W.Method of application of model to predict the light environment of individual tree crowns and its use in a eucalypt forest[J].Ecological Modelling,1992,60:199-231.
[15]BROOKS J R.Vertical gradients in photosyntics gas exchange characteristics and refixation of respired CO2within boreal forest canopies[J].Tree Physiol,1997,17:1-12.
[16]马婧,汪有科,杨荣慧,等.不同树形结构梨枣的冠层特性及节水性分析[J].干旱地区农业研究,2011(3):138-143.
[17]李宗南,陈仲新,王利民,等.两种植物冠层分析仪测量夏玉米LAI结果比较分析[J].中国农学通报,2010(7):84-88.
[18]李丹,赵经华,马英杰.基于HemiView分析的不同灌水定额对核桃树叶面积指数的影响[J].节水灌溉,2015(3):25-27.
[19]郝玉梅.黄土高原苹果树冠层结构变化与光分布规律研究[D].杨凌:西北农林科技大学,2007.
[20]张友胜,等.车八岭林下植物叶绿素分布模式及对光照条件的响应[J].华南农业大学学报,2007(3):113-115.
[21]刘国宏,谢香文.干旱区不同水分指标下限对成龄红枣生长和产量的影响[J].新疆农业科学,2011,48(1):94-98.
[22]陈继东,纪晓林,屈柏林,等.应用HemiView冠层分析系统估测人工复层林郁闭度[J].河北林业科技,2007(4):5-7,9.
[23]温一博,范文义,常颖.林冠层结构参数自动测量系统设计与试验[J].农业机械学报,2015(11):302-308.
[24]马泽清,刘琪璟,曾慧卿,等.南方人工林叶面积指数的摄影测量[J].生态学报,2008,28(5):1971-1980.
[25]李丹,赵经华,洪明,等.梨树冠层光分布特性与叶面积指数关系的研究[J].水资源与水工程学报,2015(3):227-230.
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