软管灌条件下核桃树光合作用日变化及果实品质初步研究

Primary Study on Photosynthetic Daily Variation and Fruit Quality of Walnut Trees under Hose Irrigation

以大田试验为基础,在核桃树硬核及油脂转化期采用LI-6400便携式光合作用仪观测了软管灌和对照地面灌溉条件下核桃树光合作用参数的日变化,研究了软管灌对核桃树光合作用日变化及果实产量和品质的影响。结果表明：①与地面灌溉条件下相比,软管灌条件下核桃树的净光合速率、气孔导度、水分利用效率均增加,蒸腾速率除了在10∶30~12∶30时段与地面灌条件下较为接近,其他时段都比地面灌条件下的大。②在软管灌和地面灌条件下核桃的品质及单株产量均无显著性差异。

Based on field experiment,the photosynthetic parameter daily variation of walnut trees during the stage of seeds development and oil transform under the condition of ground irrigation and surface irrigation is observed and compared by using LI-6400 instrument,and the effects of hose irrigation on photosynthetic daily variation and fruit quality of walnut trees are studied in this paper.The results show that contrasting with ground irrigation,the net photosynthesis rate,stomata conductance and water use efficiency increase under hose irrigation,the transpiration rate is higher except for the period of 10∶30 to 12∶30,in which it is close to ground irrigation.The quality and yield of walnut have not obviously difference under the condition of ground irrigation and hose irrigation.