植物硫素营养诊断技术的研究进展

作物缺S的状况在世界范围内呈现扩大的态势.作物和土壤的S素分析有助于作物获得高产.本文综述了植物可见症状、植物组织分析和土壤分析诊断技术的研究进展.植物组织分析诊断技术包括全S、硫酸盐-S、N/S比、苹果酸盐/硫酸盐比、种子含S量及小麦籽粒戊二醛浸泡比色法.分析种子的S含量是诊断大豆S素状况一个简单而又可靠的方法.这种方法是诊断植物S素营养状况的新方向,因为它可以在作物播种前确定作物的S素状况.土壤分析作为诊断土壤S状况时,还应考虑深层土壤的S含量、硫酸盐淋溶指数、环境条件及田间管理历史.

Progress of the Study on Plant Sulfur Nutrition Diagnosis Techniques

Sulfur deficiency has become increasingly widespread in the world. Plant and soil S analysis contributes to achievement of high production goals. A review is presented hereby on recent progress in the study on S diagnonsis technologies, such as evaluation by visible symptoms, plant tissue analysis and soil analysis. The technology of plant tissue analysis includes determination of total S, SO₄^2--S, N/S ratio, malate/sulphate ratio, S concentration in seeds, and colorimetric method (by soaking wheat grains in glutaraldehyde). Seed S analysis is a simple and reliable method for diagnosis of S nutrition of soybean and tends to be an important method to diagnose S nutrition in plants because it can be conducted before the seeds are sown. When soil analysis is used to diagnose S status of soils, S contents in deep soil layers, sulfate leaching indexes, environmental conditions, and management history of the fields should be taken into account.