滴施液体肥对马铃薯产量、养分吸收积累的影响

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／hm^2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...

Effects of Drip Fertigation on Yield and Plant Nutrient Accumulation of Potato

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/hm2 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 medium-term 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 67.52 mg/plant,P 8.75 mg/plant and K 77.69 mg/plant with everyday respectively.