Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution School of Life Sciences Lanzhou University Lanzhou 730000 China;
Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution School of Life Sciences Lanzhou University Lanzhou 730000 China;
Key Laboratory of Sichuan Institute for Protecting Endangered Birds in the Southwest Mountains College of Life Sciences Leshan Normal University Leshan 614000 China;
Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution School of Life Sciences Lanzhou University Lanzhou 730000 China;
Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution School of Life Sciences Lanzhou University Lanzhou 730000 China;
Brood reduction strategy; Clutch size; Egg size; Fledging rate; Hatchability; Reproductive strategy; Saxaul Sparrow;