| Abstrakt: |
The aim of the study was to investigate the root traits of alfalfa (Medicago sativa L.) under different nitrogen, phosphorus and potassium treatments in the northern Yulin sandy grassland area. Using Zhongmu No. 3 as experimental material, 15 combinations of nitrogen, phosphorus and potassium fertilizers were set up by three factors orthogonal rotation method, and the total root surface area, average root diameter, total root length, total root volume and total root biomass were measured. The results showed that the total root biomass in 0~10 cm and 10~20 cm soil layers were significantly higher than that in 20~30 cm soil layers. N16P10K8 combined application had relatively higher total root biomass, total surface area, total volume, total root length, lateral root number, and relatively lower taproot length, and its subordinate average was the highest. The study indicates that the N16P10K8 combined application can significantly increase the total root absorption surface area of alfalfa to improve its ability to absorb surface soil nutrients. [ABSTRACT FROM AUTHOR] |
