１９９０～１９９５年期间进行的夏秋麦研究及生产试验表明，由于高温对春型强春性和春型春性品种生育的促进作用，夏秋麦营养生长很快结束，分蘖少，茎叶稀，秆矮叶面积小，营养生长不充分，全生育期比同品种冬播时减少１／２以上，其中幼苗期和器官建成期两生育阶段均缩短２／３左右。单株生物量只有冬播麦的２８．２６％。夏秋麦干物质积累过程呈Ｓ型曲线，以自然生长曲线方程Ｙ＝Ｃ／ｌ＋ａｅ－ｂｘ拟合良好；生育期间干物质积累量与叶·日积呈显著正相关，与净同化率无显著相关性。产量因素亩穗数是夏秋麦高产的首要限制因子，其高低主要受播量、田间出苗率及分蘖产生状况的影响。夏秋麦幼穗分化时间短，历时２１天，但其穗粒数与冬播麦却无显著差异，仿佛分化时间与环境条件之间有一种互补效应。夏秋麦千粒重与经济系数都比冬播麦低，且年度间差异大。 Summer and autumn wheat from 1990 to 1995 conducted research and production tests showed that due to high temperature on the spring and spring spring type of spring sexual growth promotion, summer and autumn wheat nutrition soon ended, fewer tillers, thin stems, stems Shortened leaf area and insufficient vegetative growth. The whole growth period was reduced by more than one-half compared with the winter sowing of the same variety, of which two-thirds or so were shortened in both the seedling stage and the organ-construction stage. The biomass of single plant was only 28.26% of winter wheat. During the summer and autumn, the accumulation of dry matter in wheat was S-shaped, fitting well with the natural growth curve equation Y = C / l + ae-bx. There was a significant positive correlation between dry matter accumulation and leaf- Sex. Yield per acre is the number of acres of summer and autumn wheat yield the most important limiting factor, the level of the main affected by the amount of seeding, field emergence and tillering conditions. The differentiation of wheat ears in summer and autumn was short and took 21 days, but there was no significant difference between the number of grains per ear and winter sowing wheat, as if there was a complementary effect between differentiation time and environmental conditions. The grain weight and economic coefficient of summer and autumn wheat are both lower than that of winter wheat, and the difference between them is big in the year.