不同播种量和肥料用量对青稞子粒产量的影响

Effects of Seeding Rate and Fertilizers Dose on Seed Yield of Hordeum vulgare var.nudum

利用四因素五水平二次通用旋转组合设计研究青稞播种量、钾肥、磷肥和氮肥施用量与青稞子粒产量的关系。结果表明,青稞不同播种量、氮、磷、钾肥施用量对青稞子粒产量的影响为氮肥>磷肥>钾肥>播种量。青稞播种量、钾肥、磷肥、氮肥施用量过高时,产量下降的程度为钾肥>播种量>磷肥>氮肥。在一定范围内,钾肥低施用量在低播种量的情况下,青稞子粒的产量低,钾肥高施用量在高播种量的情况下,青稞子粒的产量高。在氮肥、磷肥、钾肥施用量和播种量单因素情况下,随着青稞播种量、氮肥、磷肥、钾肥施用量的增加,青稞产量逐渐增加,当增加到一定值后,又逐渐下降,过低、过高的青稞播种量、氮肥、磷肥、钾肥的施用量均可降低青稞产量。青稞子粒产量最高时的最优组合为播种量350 kg/hm2,施纯N 75.0 kg/hm2、P2O560.0 kg/hm2、K2O 22.5 kg/hm2,此时青稞子粒最高理论产量为3 817.73 kg/hm2。

The effects of seeding rate and fertilization dose on the seed yield of Hordeum vulgare L.var.nudum were studied using the method of 4 factors 5 levels versatile regressive rotary compound design.The results showed that the influence degree of seeding rate and fertilizer dose on the seed yield of H.vulgare var.nudum was N P K seeding rate.When the seeding rate and dose of N,P and K fertilizer were too high,the degree of yield reduction was K sowing dosage P N.With the increase of seeding rate,and the dose of N,P,and K fertilizer,the seed yield of H.vulgare var.nudum gradually increased firstly,then decreased.The optimum combination for achieving the highest seed yield of H.vulgare var.nudum was 350 kg/hm2 of seed rate,75.0 kg/hm2 of N,60.0 kg/hm2 of P2O5,and 22.5 kg/hm2 of K2O.The highest theoretical seed yield of H.vulgare var.nudum was 3 817.73 kg/hm2.