播种量和播种期对上海绿肥油菜生物产量及养分积累的影响  

Effects of sowing rate and sowing date on biomass and nutrient accumulation of green manure rape in Shanghai

作　　者：蒋美艳[1] 李秋红 李延莉[1] 江建霞 杨立勇[1] 周德平[1] 吴淑杭[1] 王伟荣[1] JIANG Meiyan;LI Qiuhong;LI Yanli;JIANG Jianxia;YANG Liyong;ZHOU Deping;WU Shuhang;WANG Weirong(Shanghai Academy of Agricultural Sciences,Shanghai 201403,China;Liantang Town Agricultural Comprehensive Service Center,Qingpu District,Shanghai 201715,China)

机构地区：[1]上海市农业科学院,上海201403 [2]上海市青浦区练塘镇农业综合服务中心,上海201715

出　　处：《上海农业学报》2021年第1期35-38,共4页Acta Agriculturae Shanghai

基　　金：上海市农委项目[沪农科种字(2017)第1-3号]。

摘　　要：以‘沪油17’为试验材料,通过田间试验研究不同播种量和播种期对绿肥油菜的生物产量及养分积累量的影响。结果表明:不同播种量和播种期明显影响绿肥油菜的生物产量。绿肥油菜的生物产量随着播种量增加而提高,随着播种期推迟而降低。当播种量为10.25 kg∕hm^(2)时,油菜鲜样产量为27573.47 kg∕hm^(2),干物质产量为4814.33 kg∕hm^(2)。当播种量>10.25 kg∕hm^(2)时,生物产量趋于稳定。绿肥油菜地上部氮、磷、钾积累量在各播种量处理间表现不一致;随着播种期推迟,养分积累量逐渐下降。综合考虑,本试验条件下,绿肥油菜适宜播种量为6.00—10.25 kg∕hm^(2),播种期在11月份之前较好。Taking‘Huyou 17’as material,the effects of different sowing rates and sowing dates on the biomass and nutrient accumulation of green manure rape were studied by field experiment.The results showed that the biomass of green manure rape was significantly affected by different sowing rates and sowing dates.The biological yield of green manure rape increased with the increase of sowing rate and decreased with the delay of sowing date.When the sowing rate was 10.25 kg∕hm^(2),the fresh yield of rape was 27573.47 kg∕hm^(2),and the dry matter yield was 4814.33 kg∕hm^(2).When the sowing rate was more than 10.25 kg∕hm^(2),the biomass tended to be stable.The accumulation of N,P and K in aboveground parts of green manure rape was not consistent among different sowing rates.With the delay of sowing date,the nutrient accumulation decreased gradually.Comprehensive consideration,the suitable sowing rate of green manure rape was 6.00—10.25 kg∕hm^(2),and the sowing date was better before November under the test conditions.

关 键 词：绿肥 播种量 播种期 生物产量 养分积累量 

分 类 号：S565.4[农业科学—作物学]