井式灌溉下不同径级成龄灰枣光合特性差异研究  

Study well type irrigation under different diameter grade prostagland gray jujube the difference of photosynthetic characteristics

作　　者：孙明森[1] 李宏[2] 程平[2] 张志刚[1] 刁凯[1] 苗乾乾 李长城[1] 韩莹莹[3] 

机构地区：[1]新疆农业大学林学与园艺学院,新疆乌鲁木齐830052 [2]新疆林业科学院,新疆乌鲁木齐830000 [3]新疆师范大学,新疆乌鲁木齐830054

出　　处：《中南林业科技大学学报》2017年第3期32-38,共7页Journal of Central South University of Forestry & Technology

基　　金：国家林业公益性行业专项项目"新疆特色林果提质增效关键技术研究与示范"(201304701-2)

摘　　要：将地径(12±0.5)cm灰枣记为C1,地径(18±0.5)cm灰枣记为C2,研究井式灌溉下阿克苏不同径级的成龄灰枣坐果期日动态的光合特性差异。使用Li6400光合仪在晴朗无云的天气,对C1、C2进行光合指标测定。结果表明:(1)通过日动态可知C1、C2的净光合速率(P_n)、气孔导度(Gs)、蒸腾速率(Tr)均呈明显的双峰曲线,12:00—15:00存在明显"午休现象"。(2)C2比C1的P_n、T_r分别大1.8μmol·m^(-2)s^(-1)、0.61mmol·m^(-2)s^(-1),C1、C2的WUE不显著,P_n、T_r差异极限著。(3)Gs是C1、C2最主要的内外环境影响因子。C1、C2均呈双峰曲线,C2有较高的Pn、WUE、LUE、Gs、Cond、Tr和较低的Ls,Gs是C1、C2光合日动态最主要的影响因子。Under well type irrigation, to do research on photosynthetic characteristics differences of Aksu adult ziziphus jujube with different diameters in the diurnal changes, for finding out the most suitable diameter class of adult ziziphus jujube under well type irrigation. The ground diameter of （12±0.5） cm is denoted as C1, the diameter of （18±0.5） cm is denoted as C2. To detect photosynthetic indexes with LI6400XT photosynthetic apparatus in a fine weather with no cloud and no wind. Physiological indexes of photosynthesis that need to be detected include： net photosynthetic rates（Pn）, stomatal conductances（Gs）, intercellular CO2 concentrations（Ci） and transpiration rates（Tr）. （1）The respective daily changes in the net photosynthetic rates（Pn）, stomatal conductances（Gs）, and transpiration rates（Tr） of C 1 and C2 present in double-peak curves. The daily changes of indexes above stop during 12：00-15：00. （2）When the WUE of C1 and C2 is non-significantly showed, The difference between Pn and Tr indexes of C1 and those of C2 are quite significant. P, and Tr indexes of C2 are 1.78 μmol/（m^2·s） and 0.69 mmol/（m^2·s） bigger than those of C1 respeetively. （3）Under well type irrigation, Gs is the main internal and external environmental factor on Pn rate of C1 and C2. Well irrigation under are in bimodal curve the C1 and C2, C2 had higher WUE, LUE, Pn, Gs, Cond, Tr and lower Ls, and Gs was the most important factor for C1 and C2.

关 键 词：灰枣 井式灌溉 光合 水分利用效率 

分 类 号：S718.43[农业科学—林学]