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应用化学分析、吸附反应和生物诊断方法,系统研究了六个土壤中养分的丰缺状况,确定了供试土壤存在的养分限制因子及其严重程度。结果表明,供试土壤普遍缺氮,部分土壤中磷、钾、硫、铁和铜供应不足,个别土壤中锌和硼含量偏低。在低锰浓度的吸附液中.土壤对锰的吸附强烈;铜、锌和硼吸附率不受相应吸附液浓度的制约;在高磷、硫浓度的吸附液中,各土壤对磷、硫的吸附率差距增大。三大土类的基础生产力不同,植株干重在2.73～5.55克/盆范围内变化,补充营养元素后,生产力显著提高,土类间差距缩小。 运用系统研究法得出的这些结论,针对性强,但个别环节尚需继续改进。
The application of chemical analysis, adsorption reaction and bio-diagnostic methods to systematically study the abundance and shortage of nutrients in the six soils and determine the existence of nutrient limit factors and the severity of the soil. The results showed that the tested soil was generally deficient in nitrogen, and the phosphorus, potassium, sulfur, iron and copper in some soils were insufficiently supplied, while the contents of zinc and boron in some soils were low. In the low manganese concentration adsorption solution, the soil strongly adsorbed manganese, while the adsorption rates of copper, zinc and boron were not affected by the corresponding adsorption solution concentration. In the high phosphorus and sulfur concentration adsorption solution, Absorption rate gap increases. Three kinds of soil based on different productivity, plant dry weight in the range of 2.73 ~ 5.55 g / pot change, nutritional elements, the productivity increased significantly, the gap between soil narrowing. These conclusions drawn from the system research method are highly targeted, but some aspects need to be further improved.