摘要
通过田间小区试验研究不同供钾水平对宁夏灵武农场甘蓝产量、品质和经济效益的影响,为指导当地农户的合理施肥提供依据。结果表明,增施钾肥有显著的增产作用,与对照比较各处理增产率为13.1%～20.8%;钾肥利用率随着施钾量的增加而降低,各处理为21.3%～39.1%,以施钾量75kg/hm2处理钾肥利用率最高。施钾量为75～300kg/hm2,增施钾肥均较对照可以提高甘蓝的维生素C和可溶性糖质量分数;并降低甘蓝体内硝酸盐的质量分数,各处理分别比对照降低7.32%、9.77%、8.08%和10.72%。扣除肥料投入成本,K150处理增收额最高,为1.89千元/hm2。从甘蓝的产量和品质因素综合考虑,当地甘蓝合理的施钾量应为150kg/hm2。
A field experiment was carried out in Lingwu Farmland to study the effect of potassium fertilization on cabbage yield and quality.The results showed that application K fertilizer can significantly increased cabbage yield ranged from 13.1% to 20.8%,the K fertilizer use efficiency of all treatments was ranged from 21.3% to 39.1%,which decreased slightly with increasing of K application rates,K75 treatment fertilizer use efficiency（39.1%） was the highest compared to other treatments.With the K fertilize application amount no more than 225 kg/hm2,all treatments can increase Vc and soluble sugar mass fraction in cabbage compared to CK（K0） treatment.The content of NO3-in cabbage was decreased by 7.32%,9.77%,8.08% and 10.72% of applied K in the treatment of K75,K150,K225 and K300.After discounting the effect of fertilizer input costs,the net profit of K150 treatment was the highest（1.89 thousand Yuan per hm2）.Considering cabbage yield,high efficient K use efficiency and good quality the amount of fertilizer K should be controlled within 150 kg/hm2.
出处
《西北农业学报》
CAS
CSCD
北大核心
2012年第7期168-171,共4页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国际植物营养研究所项目(IPNI项目)
关键词
甘蓝
钾肥
产量
品质
Cabbage； Potassium fertilizer； Yield； Quality
