在肥城桃核心种植区，利用田间试验研究了二月兰、毛苕子两种桃园绿肥在不同播期条件下的鲜草产量、养分含量及积累量等特征。结果表明，9月25日播种，二月兰的产草量最大，9月10日播种，毛苕子的产草量最高，10月初播种的绿肥由于苗期气温偏低，减少了冬前植株生物量，不利于越冬和冬后生长，特别是对二月兰的生长影响显著；两种绿肥翻压还田后可为土壤提供的 C 为7080～13340 kg／hm2；9月10日和9月25日播种绿肥的 C、N、P、K 养分积累量也较高。研究表明，播期显著影响桃园绿肥生长及物质养分积累，本试验条件下，两种绿肥的最适播期为9月10－25日。
Effects of Sowing Date on Growth and Nutrient Accumulation of Two Green Manures in Peach Garden
In the core cultivation region of Feicheng peach,the field experiment was carried out to study the fresh yield,nutrient content and accumulation characteristics of two green manures,February orchid (Orychophragmus violaceus)and hair vetch (Vicia villosa L.),on different sowing dates.The results showed that when the sowing date was September 25th,February orchid had the largest fresh yield,and the suitable sowing date for hair vetch was September 10th.Due to the low temperature at seedling stage,sowing in early October reduced the plant biomass before winter and was not good for growing over and after winter of green manures,especially for February orchid.The two green manures could provide carbon for soil of 7 080 ~13 340 kg/hm2 after returning to field.The sowing dates with the largest fresh yields also had higher C,N,P and K accumulation.Above all,the sowing date had great effects on growth and nutrient accumulation of two green manures in peach garden.Under this condition of experiment,the optimum sowing date was between September 10th -25th.
国家科技期刊平台
NSTL
万方数据
维普
