Impacts of co² enrichment and soil drought Oil the S accumulation an d distribution of plants

The impacts of a enrichment and soil drought on the S accumulation and distribution of plants were studied．The results show that a enrichment and soil drought can increase the S contents for different parts of winter wheat，anddecrease the S content of soybean grains．Although，soil drought increases the S content of winter wheat grains，the reduc-tion scale of yield is bigger than the increasing scale of grain S content．The impact of soil drought on the S content of soy-bean grains is more serious than that on winter wheat．Soil drought not only decreases the grain S content，but also de-creases the grain yield of soybean．The impacts of co²