小麦的库源关系对水分利用效率的影响

Effects of sink-source relation on water use efficiency of wheat.

以小麦雄性不育系和可育系为材料,通过人工授粉、去叶等处理,改变源和库的大小,对库、源变化与水分利用效率的关系进行了研究,结果表明,库/源、穗粒数及叶片光合强度均与水分利用效率呈正相关。增大库容(穗粒数、粒重)及源的供应能力(灌浆期光合强度)均有利于水分利用效率的提高。

The relationship between the changes of sink-source and water use efficiency ( WUE ) in wheat ( Triticum aestivum L ) was studied under the conditions of increasing the ratio of sink/source by cutting leaves and changing grain number of male sterile and male fertile line. The results showed that the ratio of sink/source,grain number and photosynthetic rate are positive in relevant with WUE. Enlarging sink capacity by increasing grain number and grain weight and raising source supply ability by strengthening the leaf activity could increase yield. resulting in high WUE.