不同钾肥品种对蔬菜产量和品质的影响

Study of Effect of KCl and K_2SO_4 on Yield and Qualities of Vegetable

用盆栽试验和田间试验相结合的方法研究了施用 KCl、K2 SO4 及 KCl+K2 SO4 对黄瓜、番茄、甜椒、线辣椒 4种作物生长发育、产量、品质及养分吸收量的影响。结果表明 ,施 KCl、K2 SO4 或 KCl+K2 SO4 处理对黄瓜、甜椒、线辣椒产量影响不显著 ;但对番茄 ,KCl+K2 SO4 处理与 KCl或 K2 SO4 处理相比产量差异达极显著水平。对 4种蔬菜以施 K2 SO4 处理的品质最好 ,KCl处理对黄瓜、番茄 v C含量影响较大 ,对线辣椒几乎无影响。 K对蔬菜作物 N、K养分吸收量的影响大于 P,对 K的需求量为番茄 >甜椒 >黄瓜 ,对 N的需求量为黄瓜 >甜椒 >番茄。

Pot and field experiments were carried out to study the effects of KCl and K\-2SO\-4 on yield and qualities of vegetables. The four kinds vegetable to be tested such as tomato,cucumber,green pepper and hot pepper. The results showed that application KCl, K\-2SO\-4 and KCl+K\-2SO\-4 had little effect on yields of tested vegetable except for tomato. For tomato, the yield of K\-2SO\-4+KCl treatment had a significant difference compared with K\-2SO\-4 treatment and KCl treatment. Among all treatments, K\-2SO\-4 treatment was the best one for a good qualities of vegetable.Applied KCl have led to decrease of vitami C content of cucumber and tomato, but it has little effect on hot pepper qualities. The effect of potassium on the N,K uptake amount was higher than P. For four vegetables, the amount of K needed order is tomato>green pepper>cucumber, N needed order is cucumber>green pepper>tomato.