摘要
通过大田试验,研究了在滴灌施肥条件下施用液体肥对马铃薯生长、产量及植株养分吸收积累的影响。结果表明,在该试验条件下,滴施液体肥处理马铃薯的块茎产量显著高于不施液体肥处理,增产15.47%～36.26%,其中以滴施450kg/hm2液体肥处理马铃薯块茎产量最高;在整个生长生育期,马铃薯能持续吸收养分,养分积累量的大小顺序为钾>氮>磷;在马铃薯生长的中、前期,植株中氮、磷、钾的积累量均随着生育期的延长而增加,在生长后期养分积累量的变化规律不明显;马铃薯块茎快速膨大期是块茎养分吸收量和吸收速率最快的时期,每天的吸收量分别为氮67.52mg/株、磷8.75mg/株、钾77.69mg/株。
A field experiment was carried out to evaluate the effects of liquid fertilizer on the growth, tubers yield, nutrient uptake and accumulation of potato under drip fertilization system. The results obtained were as follows： Under this experiment condition, compared with no liquid fertilizer treatment, the liquid treatment could significantly increase tuber yield of potato, the increase rate was from 15. 47% to 36.26%, the treatment of 450 kg/hm^2 liquid fertilizer got the highest tuber yield. The N, P and K nutrients were absorbed at the whole growth stage and the order of nutrients accumulation was K, N and P. The accumulation of N, P and K of potato plants were increased with the extended of early and mediumterm period, however the variation law of nutrient accumulation was not significant in late growing period. It was the greatest period of N, P and K absorption amount and rate of tuber rapid growth period, the absorption rate was N 67.52mg/plant, P 8.75 mg/plant and K 77.69 mg/plant with everyday respectively.
出处
《灌溉排水学报》
CSCD
北大核心
2011年第6期65-68,共4页
Journal of Irrigation and Drainage
基金
农业部公益性行业(农业)科研专项经费项目(201103003)
广东省科技计划项目(2010A020506022)
广东省教育部产学研结合项目(2009B090300332)
关键词
马铃薯
滴灌施肥
液体肥
产量
养分积累
potato
drip fertigation
liquid fertilizer
yield
nutrient accumulation
