【摘要】 通过对香日德地区春小麦开花后的光合作用、群体结构以及干物质累积和运转等生理指标的测定,分析了小麦在高海拔气候条件下的生理变化。结果表明,高原地区春小麦净同化能力的提高,特别是开花后同化器官功能期的明显延长是形成高产的重要原因。更多还原

【Abstract】 Some ohysiological features of spring wheat crops yielding 6.0 to 11.6 tons per ha.in the Xiang-ride Farm at an altitude of 2905 m.above the sea level are analyzed.Wheat crops grown under (?)heinvironment of the Chaidamu Basin are in possession of a series of outstanding features such as Ion-ger day-length with more stable illumination,higher rate in photosynthesis,lower respiratory lose atnight,longer functional period of assimilative organs,and a higher accumulative capacity in the earas compared with those at a lower altitude.All these are undoubtly favourable to the formation ofhigher yield.The higher grain weight which is characteristic in this region is caused chiefly by a con-siderable longer duration from flowering to full maturity (about 55～60 days).更多还原