作　　者： (陈兵）; (杜静）; (冯翠）; (焦庆清）; (张培通）;

机构地区： 江苏省农业科学院泰州农科所,泰州225300

出　　处： 《长江蔬菜》 2017年第18期130-135,共6页

摘　　要： 对江苏里下河地区种植的刮老乌慈姑氮、磷、钾养分吸收和分配特性进行了研究。结果表明,每生产1 000 kg鲜慈姑,N、P2O5和K2O的最大吸收量分别为11.21 kg、7.67 kg和18.34 kg,吸收比例大约为3∶2∶5;氮、磷、钾肥的施肥吸收率分别为25.19%、18.07%和69.23%。刮老乌慈姑氮素的关键供给期为茎叶生长期、球茎膨大期和衰老成熟期,3个阶段的氮素吸收比例为6∶2∶2;磷、钾元素的关键供给期为茎叶生长期和球茎膨大期,2个时期的吸收比例为7∶3。因此依据慈姑养分吸收规律,移栽前要足施有机肥和氮、磷、钾三元素,移栽后60 d需补充氮素、120 d需补充氮、磷、钾三元素,145 d需补充氮素,以满足刮老乌慈姑的需肥特点。 This study focus on nutrient absorption and distribution dynamic features of Gualaowu arrowhead for Lixiahe region in Jiangsu. The results showed that the maximum absorption capacity to N, P2O5 and K2O was 11.21 kg, 7.67 kg and 18.34 kg respectively for per 1 000 kg fresh corms, with a absorption ratio of 3： 2： 5. The absorption rate of nitrogen, phosphorus and potassium fertilizers was 25.19%, 18.07% and 69.23%, respectively. The key period of supply of nitrogen for Gualaowu arrowhead was the stage of growth, bulb expansion and senescence maturity, with a absorption ratio of 6： 2： 2 during the three stages. The key period of supply of phosphorus and potassium for Gualaowu arrowhead was the stage of stem and leaf growth and bulb expansion, with a absorption ratio of 7 ： 3. Based on the characteristics of nutrient absorption in arrowhead, it was necessary to fertilize with sufficient organic fertilizer and N, P, K fertilizer before transplanting, with topdressing nitrogen nutrition at 60 d and 145 d after transplanting, and applying with N, P, K fertilizers at 120 d after transplanting, respectively.

关 键 词： 院慈姑 氮 磷 钾 养分吸收分配