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1 土壤 (Soils), 2014, 46(2): UV-B 增强下施钾对大麦抽穗期生理特性日变化的影响 1 1 1, ( ) UV-B CO 2 UV-B 2 (CK 1.5 KJ/(m 2 h)) 120%(1.8 KJ/(m 2 h)) 2 (K1 K 2 O 73 kg/hm 2 ) (K2 K 2 O 150 kg/hm 2 ) UV-B CO 2 UV-B UV-B S162 (CFCs) 1% 2% [1 2] UV-B [3] UV-B [4 7] Hill [8] [9] [10] UV-B UV-B [11 13] UV-B [14 17] UV-B [18] UV-B UV-B UV-B (32 03 N E) 19.4 g/kg 1.5 g/kg 16.2 mg/kg mg/kg 261 g/kg ph 6.2 (1.. 1 ) UV-B ( 280 ~ 320 nm) UV-B 280 nm (UV-C) UV-B UV-B UV-B 2 CK( 1.5 KJ/(m 2 h)) UV-B(1.8 KJ/(m 2 h) 4 5 UV-B 120% 2 (K 2 O 73 kg/hm 2 ) (K 2 O 150 kg/hm 2 ) 3 3 m 3 m = 9 m 2 ( ) (BK ) ( ) 333 (1968 ) yunshlou@aliyun.com

2 2 UV-B 251 ( 2 ) g UV-B 0.8 m 8:00 16:00 8 h 1.2 8:00 16:00 PPS CIRAS-1 CO 2 2 h SPSS P < 0.05 * P < 0.01 ** UV-B 1 UV-B 3.8% ~ 11.9% UV-B Fig. 1 图 1 不同处理大麦叶片中叶绿素含量的影响 Diurnal changes of chlorophyll contents in leaves of barley as affected by enhanced UV-B radiation and K supply UV-B [19] UV-B UV-B ph [20] UV-B a b (a+b) [21] UV-B, [26] UV-B 2.2 UV-B 2 UV-B (P < 0.05) (P < 0.01) UV-B UV-B UV-B UV-B 10:00 14:00 12:00 10:00 14:00 [22]

3 Fig. 2 图 2 不同处理大麦抽穗期叶片净光合速率日变化 Diurnal changes of net photosynthetic rates in leaves of barley as affected by enhanced UV-B radiation and K supply 2.3 UV-B CO 2 UV-B [23 24] 3 8:00 UV-B 38.5% 29.9% (P < 0.05) (P 0.01) UV-B Fig. 3 图 3 不同处理大麦叶片气孔导度的日变化 Diurnal changes of stomatal conductivities in leaves of barley as affected by enhanced UV-B radiation and K supply 2.4 UV-B CO 2 4 UV-B CO 2 (P < 0.05) 12:00 (P < 0.01) 8:00 10:00 (P < 0.05) CO 2 8:00 10:00 10:00 12:00 14:00 UV-B UV-B CO 2 UV-B CO UV-B 5 14:00 UV-B UV-B

4 2 UV-B 253 Fig. 4 图 4 不同处理大麦抽穗期叶片胞间 CO 2 浓度的日变化 Diurnal changes of intercellular CO 2 concentrations in leaves of barley as affected by enhanced UV-B radiation and K supply Fig. 5 图 5 不同处理大麦叶片蒸腾速率的日变化 Diurnal changes of transpiration rates in leaves of barley as affected by enhanced UV-B radiation and K supply UV-B UV-B [25] UV-B 28.7% 23.2% UV-B UV-B 2.6 UV-B CO 2 [26] W = Pn/Tr W Pn Tr 6 UV-B 3 UV-B CO 2 CO 2 UV-B UV-B [27] UV-B 3.8% ~ 11.9% UV-B

5 Fig. 6 图 6 不同处理大麦叶片水分利用率的日变化 Diurnal changes of water use efficiencies in leaves of barley as affected by enhanced UV-B radiation and K supply UV-B CO 2 UV-B UV-B UV-B CO 2 [28] UV-B UV-B [1]. (GB/T ) [S]. :, 2007 [2] McKenzie RL, Aucamp PJ, Bais AF. Changes in biologically-active ultraviolet radiation reaching the Earth s surface[j]. Photochem Photobiol Sci, 2007, 6: [3],,. [J]., 1993,13(1): [4] Breznik B, Germ M, Gaberscik A. Combined effects of elevated UV-B radiation and the addition of selenium on common and tartary buckwheat[j]. Photosynthetica, 2005, 43(4): [5],,,,,,,. UV-B [J]., 2011, 27(4): [6] Yao Y, Xuan Z, Li Y. Effects of ultraviolet-b radiation on crop growth, development, yield and leaf pigment concentration of tartary buckwheat under field conditions [J]. Eur. J. Agr., 2006, 25: [7],,. (UV-BC) 47 [J]., 2002, 23(3): [8],,. Ce(III) UV-B [J]., 2007, 28(6): [9],. UV-B [J]., 2006, 25(4): [10],,. UV-B 20 [J]., 2004, 23(1): [11],,. UV-B [J]., 2001, 10 (3): [12] Berkeleari EJ, Ormord DP, Hale BA. Influence of PAR on the effects of UV-B radiation on Arabitopsis thaliana[j]. Photo-biol., 1996, 64(1): [13] Mark U, Tevini M. Combination effects of UV-B radiation and temperature on sunflower and maize seedlings[j]. J. Plant Physiology, 1996, 148(1/2): [14],,. UV-B NaCl [J]., 2004, 30(1): [15],,. UV-B [J]. 2004, 23(2): [16] Miller HE, Booker FL, Fiscus EL. UV-B radiation and ozone effects on growth, yield and photonthesis of soybean[j]. J. Environ.Qual., 1994, 23(1): [17],,. UV-B DNA [J]., 2002, 22(3): [18]. [J]., 2007(8): [19],,. [J]., 1995, 15(4):

6 2 UV-B 255 [20],,. B [J]., 2000, 24(1): [21],. [J]., 1998, 18(5): [22] de Pinheiro Henriques AR, Marcelis LFM. Regulation of growth at steady-state nitrogen nutrition in lettuce: interactive effects of nitrogen and irradiance[j]. Ann. Bot., 2000, 86(6): [23] Sullivan JH, Teramura AH, Dillenburg LR. Growth and photosynthetic response of field-grown sweetgum seedlings to UV-B radiation[j]. Am. J. Bot., 1994, 81(7): [24] Teramura AH, Zidka LH, Sztein AE. Changes in growth and photosynthetic capacity of rice with increased UV-B radiation[j]. Physiol. Plant, 1991, 83(3): [25],,. [J]., 1995, 14(4): [26],,, CO 2 [J]., 2005, 21(3): [27],,. [J]., 1995, 15(4): [28],,,. UV-B [J]., 2012, 33(2): Effect of Potassium Supply on Diurnal Variations of Photosynthesis and Transpiration at Barley Heading Stage Under Enhanced UV-B Radiation LOU Yun-sheng 1, ZENG Zhi-ping 1, HAN Yan 1,2, WU Lei 1, MENG Yan 1 (1 College of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing , China; 2 College of Environment and Plan, Henan University, Kaifeng, Henan , China) Abstract: Field experiment was conducted to investigate the effects of K supply on diurnal variations of net photosynthetic rate, transpiration rate, stomatal conductivity, intercellular CO 2 concentration and water use efficiency in barley leaves at heading stage under enhanced UV-B radiation at the Station of Agricultural Meteorology, Nanjing University of Information Science and Technology, Nanjing, China. The experiment was designed with two UV-B radiation levels, i.e. ambient (CK, 1.5 kj/(m 2 h)) and enhanced by 120% (1.8 kj/(m 2 h)); and two K supply levels, i.e. 73 kg K 2 O/hm 2 (low) and 150 kg K 2 O/ hm 2 (high). The results showed that enhanced UV-B radiation declined chlorophyll content, net photosynthetic rate, transpiration rate and stomatal conductivity in barley leaves, but had no obvious effect on intercellular CO 2 concentration and water use efficiency. Increasing K supply could alleviate the damage of enhanced UV-B radiation to net photosynthetic rate from enhanced UV-B radiation, but not to transpiration rate and stomatal conductivity Key words: Barley, UV-B radiation, Potassium fertilization, Diurnal variations

5月15期

5月15期中国农学通报 2012,28(15):106-111 Chinese Agricultural Science Bulletin 旱地小麦休闲期不同耕作措施对土壤水分蓄纳利用与产量形成的影响贺立恒, 高志强, 孙敏, 李青 ( 山西农业大学农学院, 山西太谷 030801) 摘要 : 为了提