Seeding and Harvesting Times and Climate Conditions Are Important for Improving Nitrogen and Fiber Contents of Green Manure Sunn Hemp

The efficient use of green manure enhances sustainable nitrogen (N) cycling in agroecosystems. Appropriately utilizing the differences N and fiber between cultivars or harvesting times strengthens efficiency for subsequent crops. Therefore, it is necessary to clarify these differences. We clarified fibers from four sunn hemp (Crotalaria juncea L.) commercial at two after spring summer seeding three years. Only a few significant were found any components cultivars. Although produced almost no flowers May seeding, earliest flower opened 50 days (DAS) then significantly increased by 60 DAS (p < 0.05), July seeding. Sunn DMY had larger values than those all years seedings 0.01). Significant also observed more total carbon (TC), (TN), C/N ratio (CN), nitrate (NO3-N), acid detergent (ADF), neutral (NDF) 0.05). ADF yields greater 2019 2020 These results suggest that harvest time are important decomposition estimations, although with equivalent flowering characteristics not worth considering. Additionally, measurements except NDF This result suggests yearly effect difference weather conditions, which causes yield, nitrogen, contents, an factor decomposition.