| Effects of long-term green manurehairy vetch on soil nitrogen supply on the Qinghai Plateau |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2018.06.16 |
| Key Words: multiple cropping green manure soil nitrogen transformation Qinghai Plateau |
|
| Hits: 1370 |
| Download times: 657 |
| Abstract: |
| In this experiment, we studied the effect of green manure crop, hairy vetch, on spatial and temporal variation of soil N in the rapeseed field. hairy vetch was planted after wheat was harvested followed by planting rapeseed. The results showed that the total N, available N, NO-3-N, and NH+4-N in the soil during the growth period of the rapeseed (Brassica napus L.) were higher than those in plots untreated with hairy velvet, however, the vetch treatment resulted in lower NO-3-N in the soil than that in untreated soil. The results also showed that the combination of hairy vetch green manure and chemical fertilizers had better results than CK and chemical fertilizers did along. The green manure improved the total N, available N, NO-3-N, and NH+4-N from 9.54% to 18.33% than CK and 0.94% to 19.28% over chemical fertilizers. It also resulted in lower NO-3-N content in the soil in a range of 7.01% to 38.51% than chemical fertilizers. Therefore, the application of green manure in the wheat-rapeseed cropping system improves soil nitrogen, nitrogen cycling, and soil fertility during the growing season of wheat-rapeseed. |
|
|
|