摘要
试验比较了在山东莱阳的生产条件下畦灌和喷灌方式对菠菜(SpinaciaoleraceaL.)的生长和氮素吸收利用的影响。结果表明,在两种灌溉条件下施N180kg hm2处理的菠菜产量最高。播后29d,相同氮素处理下喷灌的菠菜生长明显好于畦灌;喷灌条件下的施N120与180kg hm2处理的菠菜产量无明显差异,但在畦灌条件下二者差异显著。高氮条件下喷灌比畦灌可明显减少表观氮素损失,可考虑减少氮素投入。在本试验条件下,菠菜施氮量(即施肥量和播前根层土壤无机氮之和)喷灌和畦灌应分别为N164和224kg hm2,以保证秋季露地菠菜的生长而不造成肥料的浪费。
Effects of border and sprinkler irrigation patters on nitrogen utilization of spinach (Spinacia oleracea L.) with different nitrogen levels were studied in the open field of Laiyang, Shandong province. The results showed that the high yield were investigated in the treatment of N 180 kg/hm^2 under two irrigation patterns. Since 29 days after seeding, the spinach growth was better in sprinkler irrigation than that in border irrigation under same N levels. The yield of spinach was not different between the nitrogen treatment with N 120 and 180 kg/hm^2 in sprinkler irrigation but significantly in strip irrigation. It indicated that the sprinkler irrigation could reduce N loss and improve N use efficiency compared with border irrigation. Therefore the target values (sum of applied N and soil N_(min) at preplanting) of N supply for spinach growth are N 164 and 224 kg/hm^2 for sprinkler irrigation and border irrigation, respectively under the experimental conditions.
出处
《植物营养与肥料学报》
CAS
CSCD
北大核心
2004年第4期398-402,共5页
Journal of Plant Nutrition and Fertilizers
基金
博士后基金项目
国家"十五"攻关项目(2002BA516A02)资助。
