农林复合系统中南酸枣蒸腾特征及影响因子

摘要/Abstract

摘要： 用热平衡法(Granier法)确定了南酸枣蒸腾量,研究了低丘红壤农林复合系统中南酸枣(Choerospondias axillaries)蒸腾的日变化特征、对复合利用方式及截枝处理的响应,并利用相关分析和多元逐步回归分析方法,探讨了影响蒸腾的因素.结果表明,蒸腾速率具有明显的早晚低、中午高的日变化特征,但在不同日期蒸腾速率日变化曲线存在一定差异,且在旱季晚间23:30后仍有茎流现象.南酸枣蒸腾主要受深层土壤水分的影响,与100 cm土壤深处的水势呈极显著正相关(R=0.737^**).农林复合,通过树木对深层水分的利用及微区域环境的改变,提高了植物蒸腾量40%～10%,为实现水分高效利用提供了可能.在影响蒸腾作用的气象因子中,光辐射强度、气温、地温是主要因子,而空气饱和水汽压差和风速次之.最后给出了依据气象因子估算茎流流速的统计模型.

关键词: 蒸腾量, 农林复合系统, 影响因子

Abstract: Measurement of transpiration is essential to assess plant water use efficiency.Applying Grainer method,this paper measured the sap flow of Choerospondias axillaries in an agro-forestrial system,aimed to evaluate the effects of intercropping and pruning on the diurnal variation of transpiration,and to relate the transpiration rate with climatic factors.The results showed that the diurnal variation of Choerospondias axillaries transpiration rate appeared in parabola,low in the morning and evening,and high at noon.The transpiration rate was closely related to leaf stomatal conductivity and soil water potential,especially the water potential in 100 cm soil depth(R=0.737^**).The transpiration rate of Choerospondias axillaries was increased by about 40%～160% in agro-forestrial system through the changes in regional environment and in the deep soil water use by tree.Correlation analysis and multi-factor successive regression analysis indicated that the transpiration was controlled by ray radiation intensity,air temperature and ground temperature,followed by the difference between saturated and actual vapor pressure and the wind speed.A statistical model for calculating the sap flow rate by micrometeorological factors was also provided.

Key words: Transpiration, Agro-forestrial system, Affecting factors

中图分类号:

S161.4⁺1

赵英, 张斌, 赵华春, 王明珠. 农林复合系统中南酸枣蒸腾特征及影响因子[J]. 应用生态学报, 2005, 16(11): 2035-2040.

ZHAO Ying, ZHANG Bin, ZHAO Huachun, WANG Mingzhu . Transpiration of Choerospondias axillaris in agro-forestrial system and its affecting factors[J]. Chinese Journal of Applied Ecology, 2005, 16(11): 2035-2040.

参考文献

[1] Anandacoomaraswamy A, De Costa WAJM, Shyamalie HW, et al.2000. Factors controlling transpiration of mature field-grown tea and its relationship with yield. Agric For Meteorol, 103:375 ～ 386
[2] Ansley RJ, Dugas WA, Heuer ML, et al. 1994. Stem flow and porometer measurements of transpiration from honey mesquite (Prosopis glandulosa). J Exp Bot, 45:847 ～ 856
[3] Asseng S, Ritchie JT, Smucker AJM, et al. 1998. Root growth and water uptake during water deficit and recovering in wheat. Plant Soil, 201:265 ～ 273
[4] Caldwell MM, Richards JH. 1989. Hydraulic lift:Water efflux from upper roots improves effectiveness of water uptake by deep roots.Oecologia, 79:1 ～ 5
[5] Duan H-P(段华平),Xie X-L(谢小立),Wang K-R(王凯荣).2002.Transpiration oftea plants on red soil slopes and its influecing factors.Rural Eco-Environ(农村生态环境),18(2):19～23(in Chinese)
[6] Granier A.1985.Une nouvelle methode pourla mesure du flux deseve brute dans le tronc des arbres.Ann Sci For,42:193～200
[7] Granier A.1987.Evaluation of transpiration in a Douglas-fir stand by means of sapflow measurements.Tree Phyiol,3:309～320
[8] Guo L-S(郭连生),Tian Y-L(田有亮).1994.Relations of four coniferous young trees'photosynthetic and transpiration rates to soil moisture content and their drought resistance.Chin J Appl Ecol(应用生态学报),5(1):32～36(in Chinese)
[9] Liao G-R(廖观荣),Zhong J-H(钟继洪),Guo Q-R(郭庆荣),et al.2001.Effect of soil water on transpiration and growth of young eucalyptus.Soil Environ Sci(土壤与环境),10(4):285～288(in Chinese)
[10] Lu P. 1997. A direct method for estimating the average sap flux density using a modified Granier measuring system. Aust J Plant Physiol, 24:701～705
[11] Luo Z-L(罗中岭).1997. The development and applicationof thermal methods for measuring sap flow. Agromet China (中国农业气象),18(3):52～57(in Chinese)
[12] Mang P(孟平),Zhang J-S(张劲松),Fan W(樊巍),et al.2004.Study on Agriforestry System.Beijing:Science Press.28～37(in Chinese)
[13] Mo X-G(莫兴国),Liu S-X(刘苏峡),Yu H-N(于沪宁),et al.1997. Seasonal variation of energy budget and evapotraspiration partitioning in wheat field. Acta Geogr Sin(地理学报), 33(2):117 ～ 126 (in Chinese)
[14] Penuelas J, Filella I. 2003. Deuterium labelling of roots provides evidence of deep water access and hydraulic lift by Pinus nigra in a Mediterranean forest of NE Spain. Environ Exp Bot, 49:201 ～ 208
[15] Sekiya N, Yano K. 2004. Do pigeon pea and sesbania supply groundwater to intercropped maize through hydraulic lift-Hydrogen stable isotope investigation of xylem waters. Field Crops Res,86:167～173
[16] Sributta A, Higuchi H. 2004. Changes in seasonal evapotranspiration, soil water content, and crop coefficients in sugarcane, cassava, and maize fields in Northeast Thailand. Agric Water Man, 67:133～ 143
[17] Sun P-S(孙鹏森),Ma L-Y(马履一),Wang X-P(王小平),et al.2002.Temporal and spatial variation of sap flow of Chinese pine (Pinus tabulaeformis).J Beijing For Univ(北京林业大学学报),22(5):1～6(in Chinese)
[18] Tornebieze R, Sinoquet H, Bussière F. 1996. Modelling evapotranspiration partitioning in a shrub/grass alley crop. Agric For Met,81:255 ～ 272
[19] Van Noordwijk M, Lusiana B. 1999. WaNuLCAS, a model of water, nutrient and light capturein agroforestry systems. Agrofor Syst, 43:217～ 242
[20] Wang M-B(王孟本),Li H-J(李洪建),Chai B-F(柴宝峰),et al.1999. A comparison of transpiration, photosynthesis and transpiration efficiency in four tree species in the loess region. Acta Phytoecol Sin(植物生态学报),23(5):401～410(in Chinese)
[21] Whitehead D. 1998. Regulation of stomatal conductance and transpiration in forest canopies. Tree Physiol, 18:633 ～ 644
[22] Xie H(谢华),Shen R-K(沈荣开).2001.Experimental research on transpiration of winter wheat with stem flow gauge.Irrig Drainage(灌溉排水),20(1):5～9(in Chinese)
[23] Xie J-X(谢京湘)-1989.Survey in agroforestry.J Beijing For Univ(北京林业大学学报),10(1):104～108(in Chinese)
[24] Xie X-L(谢小立),Duan H-P(段华平),Wang K-R(王凯荣).2003. Study on surface water transport in agricultural landscape on the slope lands of red soil(dry season) Ⅱ. Water transport st leafatmosphere interface.Chin J Eco-Agric(中国生态农业学报),11(4):59～62(in Chinese)
[25] Zhang B(张斌),Ding X-W(丁献文),Zhang T-L(张桃林),et al. 2001. Variation of hydraulic resistances in red soil-crop-air continuums in different farming systems in dry season. Acta Pedol Sin (土壤学报),38(1):17～23,38(in Chinese)
[26] Zhang B(张斌),Zhang T-L(张桃林).1997.Hydraulic ecological characteristics of alley cropping systems and its productivity in low hilly red soil region.Chin J Ecol(生态学杂志),16(4):1～5(in Chinese)
[27] Zhang J-Y(张均营),Liu Y-M(刘亚民),Wu B-Q(吴炳奇).1999. Effect of agroforestry system on eco-environment in the plain of Hebei Province.For Technol Hebei(河北林业科技),(supp.):40～42(in Chinese)
[28] Zhu S-H(祝世惠),Yang S-T(杨树堂),Xu K-Z(徐可章),et al.1994. Effect of intercrop between maize and wheat on light and CO₂, transpiration, stomatal conductance. J Jilin Agric Univ (吉林农业大学学报),16(supp.):84～85(in Chinese)