高Co<sup>2</sup>浓度与土壤干旱对植物体内硫积累及分配的影响研究

高Co²浓度与土壤干旱对植物体内硫积累及分配的影响研究

摘要: 人工模拟大气CO²浓度倍增和土壤干旱对植物体内S含量积累及分配的影响研究结果表明，高CO²浓度和土壤干旱均使冬小麦不同部位含s量增加，而使大豆籽粒中s含量减少；干旱虽使小麦籽粒s含量增加，但却使小麦籽粒减产幅度大于s含量增幅。干旱对大豆的影响大于小麦，干旱减少大豆s含量，且降低大豆产量。高^CO2)浓度和土壤干旱对毛乌素3种牧草优势种茎和叶s含量的影响较复杂，但干旱使茎和叶生物量降幅远大于s含量变化。高C0²浓度和土壤干

Abstract: 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