目的研究薏苡在干旱胁迫条件下对其叶片生理指标、产量及籽粒品质的影响。方法采用盆栽干旱胁迫处理,测定不同时期的叶片净同化率、比叶重、叶绿素、气孔阻力、蒸腾速率、绿叶面积、粒灌浆时间、线性灌浆速度、籽粒百粒重、单株有效穗数、单穗穗粒数、结实率、单株产量、籽粒蛋白质、脂肪含量。结果中度干旱胁迫条件下薏苡叶片净同化率下降、比叶重减少、叶绿素降低、气孔阻力增加、蒸腾速率下降、绿叶面积减小、籽粒灌浆时间缩短、线性灌浆速度降低、籽粒百粒重降低、单株有效穗数分化减少、单穗穗粒数减少、结实率下降、单株产量下降。结论在遭受各期干旱胁迫下薏苡叶片各项生理指标影响较大,籽粒变小,产量降低,但籽粒蛋白质、脂肪含量增加。 Objective To study the effects of Coix lachrymapa on physiological indexes, yield and grain quality of leaves under drought stress. Methods The leaf net assimilation rate, specific leaf weight, chlorophyll, stomatal resistance, transpiration rate, green leaf area, grain filling time, linear filling speed, grain weight per plant, panicles per panicle, Spike per panicle, Seed setting, Yield per plant, Grain protein, Fat content Results Under moderate drought stress, the net assimilation rate of Coix lachryma - jobi decreased, leaf specific gravity decreased, chlorophyll decreased, stomatal resistance increased, transpiration rate decreased, green leaf area decreased, grain filling time shortened, linear filling speed decreased, , The number of effective panicle per plant decreased, the number of spikelets per panicle decreased, the seed setting rate decreased and the yield per plant decreased. Conclusion All physiological indices of Coix lachryma-jobi (C. larch) leaves under various drought stress conditions have a greater impact, with smaller kernels and lower yield, but with increased grain protein and fat content.