控释肥在苹果苗圃上的应用

通过大田试验,研究了控释肥在土壤中的养分释放规律,及其对当年生平邑甜茶实生苗生长发育的影响。结果表明:控释肥在土壤中养分的释放速率分为增加、高峰、减小3个阶段;控释肥对养分持续、稳定的供应满足了平邑甜茶在整个生长期内对养分的需求,促进了作物的生长。在施肥量相等的情况下,控释肥CRF1处理(N、P2O5、K2O施用量分别为630、150、480kg/hm2)作物的各项生长指标都显著高于速效肥SF处理;即使施肥量降低的控释肥CRF2(N、P2O5、K2O施用量分别为504、120、384kg/hm2)、CRF3(N、P2O5、K2O施用量分别为320、120、400kg/hm2)处理,其作物各项生长指标都不低于SF处理。

Effects of Controlled-release Fertilizers on Annual Apple Rootstock

Field experiments were conducted to study the effects of controlled-release fertilizer on annual apple rootstock.The results showed that three release stages were found in release curve of controlled-release fertilizers: increasing stage,peak stage,decreasing stage.Controlled-release fertilizers met the nutrient requirements of plant,and then promoted the plant’s growth.The application rate of CRF1(The application of N,P2O5,K2O were 630,150,480 kg/hm2) was same as that of SF,but the growth indices of CRF1 were better than that of SF.And the application rate of SF was higher than that of CRF2(The application of N,P2O5,K2O were 504,120,384 kg/hm2),CRF3(The application of N,P2O5,K2O were 320,120,400 kg/hm2),but there was no difference in growth indices.