关键词: 小麦, 增铵营养, 净光合速率, 可溶性糖, 硝酸还原酶

Abstract: As the main plant organ of absorbing and transporting water and nutrients, root system and its metabolism directly affect plant growth and development. Optimal and stable rhizosphere temperature is the important guarantee for root growth and metabolism. The heat stress around rhizosphere during hot summer is an important factor limiting the growth and yield of plants. On the basis of clarifying the concept of high rhizosphere temperature, this paper summarized the research progress in the effects of high rhizosphere temperature on plant growth and yield, water relations in plant, photosynthesis and dry matter production, respiration and mineral nutrition, hormone metabolism, and resisting enzyme system of plants. Further research aspects and application prospects of controlling high rhizosphere temperature were suggested.

Key words: Wheat, Enhanced ammonium nutrition (EAN), Net photosynthetic rate, Soluble sugar, Nitrate reductase (NR)