不同施肥处理对光叶紫花苕根及根瘤生长的影响.

In order to clarify nodule and root growth of Vicia villosa in the purple hilly area of Sichuan under different fertilizer treatments, the field experiment was conducted. The eight different fertilizer treatments were designed, and their root system and nodule growth were studied. The results showed that the difference of V. villosa root length, root dry weight, nodule number, nodule fresh weight is significant in the purple hilly area of Sichuan under the eight different fertilizer treatments. Phosphor, potassium and microelement fertilizer could significantly promote the growth of root and nodule. The root length, root dry weight, nodule number and nodule fresh weight of Vicia villosa under no nitrogen application were improved during its early growth stage and moderate nitrogenous fertilizer was an essential way to be supplemented during its middle and later growth stage. At the same time, the correlation and path analysis showed that the root dry weight was most correlated with dry weight of individual plant, and the correlation coefficient was 0.93, the path coefficient was 0.7220. Therefore, phosphorus and potassium fertilizer are very important to the growth of Vicia vilosa . And moderate nitrogenous fertilizer may be used to improve the growth of root and nodule, which can increase fertilizer use efficiency. [ABSTRACT FROM AUTHOR]