不同种类硫肥对冬小麦光合性能和子粒产量性状的影响

为明确不同种类硫肥对小麦光合性能等性状的影响，进行了3种硫肥效果的比较研究。施用硫肥的处理都表现为旗叶光合速率提高，旗叶和倒三叶及各生育时期顶部功能叶的叶绿素含量提高，旗叶硝酸还原酶活性增强，且子粒产量及产量构成因素有所提高。在对提高光合速率、叶绿素含量和产量构成因素的效果上以石膏的效果最明显，硫酸铵次之，硫磺的效果最差，而在提高硝酸还原酶活性上却依次为硫酸铵、硫磺和石膏。

Effects of Different Sulphur Fertilizers on Photosynthetic Characteristics and Yield Performances in Winter Wheat

In order to clarify the effects of different sulphur fertilizers on photosynthetic characteristics of wheat,a field experiment was conducted with three kinds of sulphur fertilizers,including sulphur,ammonium sulphate and gypsum.The results were that,comparing with ck,all the treatments with sulphur fertilizers showed higher photosynthetic rate in flag leaves,higher chlorophyll contents in the two or three leaves on the top of wheat plants,higher nitrate reductase(NR) activity,and improved grain yield components were improved.For the effects of improving photosynthetic rate,chlorophyll content and yield components,gypsum was the best,next was ammonium sulphate,and sulphur was the poorest.For the effect of enhancing nitrate reductase(NR) activity,however,the best sulphur fertilizer was ammonium sulphate,the next was sulphur and gypsum.