论文部分内容阅读
采用田间小区试验方法,对海南露地辣椒钾肥效应进行研究。结果表明:露地辣椒适量施钾较不施钾显著增产和提高经济效益,总体上辣椒产量和经济效益均随钾肥用量的增加呈先增后减的趋势;辣椒施钾较不施钾增产3.4%~18.9%,平均9.1%;施K2O 450 kg/hm2以内,辣椒施钾提高经济效益4.4%~16.5%,平均9.5%;施K2O 300 kg/hm2处理的产量和经济效益均最高。增施钾肥可提高辣椒果实维生素C含量,随着钾肥用量的增加,辣椒果实维生素C含量呈增加的趋势;辣椒适量施钾能显著增加果长和果肉厚,平均果长增加5.1%,果肉厚增加13.7%;适量施钾可显著增加辣椒叶、茎和果实的钾吸收量,大小为果实>茎>叶;辣椒施K2O 300 kg/hm2处理的钾肥农学利用率最高,为31.7 kg/kg;本试验条件下,海南露地辣椒钾肥适宜用量为K2O 300 kg/hm2左右。
The field plot test method was used to study the effect of potash fertilizer on potatoes in Hainan open field. The results showed that the suitable amount of potassium in field pepper increased yield and economic benefit compared with no potassium application. Generally, the yield and economic efficiency of pepper increased firstly and then decreased with the increase of potassium application rate. The yield of pepper increased by 3.4% ~ 18.9% with an average of 9.1%. K 2 O 450 kg / hm 2 could increase the economic benefit by 4.4% ~ 16.5% and average 9.5% with K 2 O 3 application. The yield and economic benefits of K 2 O 300 kg / hm 2 were the highest. The increase of potassium fertilizer could increase the content of vitamin C in pepper fruit. With the increase of potassium fertilizer, the content of vitamin C in pepper fruit increased. The appropriate amount of potassium applied to pepper significantly increased fruit length and pulp thickness. The average fruit length increased by 5.1% Increased by 13.7%. Appropriate amount of K could significantly increase the potassium uptake of leaves, stems and fruits of pepper, the size of the fruit> stem> leaf; the highest agronomic utilization rate was 31.7 kg / kg, Under the conditions of this experiment, the appropriate amount of potash fertilizer for Hainan open-pit pepper is K2O 300 kg / hm2.