不同有机肥用量对黄瓜生长及养分吸收的影响

在温室基质栽培条件下,研究了配施等量化肥时不同用量有机肥对黄瓜生长及养分吸收的影响。试验采用有机肥系烘干鸡粪,所有供试肥料均以底肥形式一次施入。研究结果表明,高量有机肥处理(有机肥50,100 kg/m3)严重抑制了黄瓜定植初期的生长,黄瓜前期产量也明显低于不施或低量有机肥处理。随着施肥量的增加,黄瓜氮、磷、钾养分吸收量均显著增加。黄瓜定植后74 d,所有处理基质的速效氮养分均已处于极低的水平,黄瓜普遍出现缺肥症状。试验初步证明了长季节栽培条件下一次施用高量有机肥难以及时提供足量的速效氮源,无法满足蔬菜养分需求。

Effect of Different Rate of Organic Fertilizer on Growth of Cucumber and Its Nutrients Uptake

Substrate cultivation experiment was carried out in greenhouse to study the effect of different rate of organic fertilizer combined with same level of chemical fertilizers on growth of cucumber and its nutrients uptake.All the fertilizers were applied once as base fertilizer,among which chicken manure was chosen as the organic fertilizer for study.The results showed that high rate of organic fertilizer,which rate were 50,100 kg/m~3 respectively,inhibited cucumber growth at early stage significantly,and therefore reduced their early stage yield.Nitrogen,phosphorus and potassium nutrients uptake by cucumber increased with higher fertilizers rate.Available nitrogen in the substrate of all treatments was very low and evident symptoms of nutrient absence in cucumber plants appeared to certain extent 74 days after cucumber transplanting.The study demonstrated that application of high amount of organic fertilizer once could not supply enough available nitrogen for vegetable long-term growth.