以新麦18号(CK1)和豫麦49号(CK2)为对照,对周麦18号小麦品种生理生化特性及其产量构成进行了研究。结果表明,周麦18号产量构成因素比较协调,其千粒重最高,为48.8g,分别较新麦18号、豫麦49号提高21.1%、32.2%。周麦18号在灌浆期具有较高的叶面积指数、较稳定的净光合速率、较低的冠层温度,灌浆强度达1.28g/(d.千粒),还具有较强的碳、氮代谢活性以及灌浆中后期较强的根系活力,这些特性是周麦18号高产稳产的保证。 The physiological and biochemical characteristics and yield components of wheat variety Zhoumai 18 were studied with CK1 and CK2 as CK. The results showed that the components of production of Zhoumai 18 were more harmonious and the grain weight was the highest, 48.8g, which was 21.1% and 32.2% higher than that of Xinmai 18 and Yumai 49 respectively. Zhoumai 18 had higher leaf area index, stable net photosynthesis rate, lower canopy temperature and grain filling intensity of 1.28g / (d. 1000 grains) at grain filling stage, and stronger carbon and nitrogen Metabolic activity and strong root activity in the late filling stage, these characteristics are the guarantee of high and stable yield of Zhoumai 18.