不同浓度钾对基质栽培樱桃番茄营养生长的影响

[目的]为樱桃番茄基质栽培中合理施用钾肥提供科学依据。[方法]以樱桃番茄为试验材料,于2010年2~6月研究无土栽培营养液中不同浓度钾（3、8、13 mmol/L,分别以处理K3、K8、K13表示）对番茄株高、茎粗、叶面积和叶片数的影响。[结果]K8处理植株的茎粗和叶面积极显著大于K3、K13处理,株高和叶片数显著大于K3、K13处理。2010年6月12日,处理K3、K8、K13番茄植株的平均茎粗分别为1.010、1.339、1.032 cm,平均叶面积分别为0.262、0.291、0.191 m2,平均株高分别为93.48、112.65、101.13 cm,平均叶片数分别为14.0、16.5、14.3片。[结论]无土栽培营养液中钾浓度为8 mmol/L的处理较适合樱桃番茄生长。

Influence of Potassium with Different Concn.on Vegetable Growth of Tomato Cultivated with Substrate

[Objective]The purpose was to supply scientific foundation for reasonable application of potassium(K) fertilizer in tomato cultivation.[Method] With cherry tomato as the tested material,the influences of K with different concn.(3,8 and13 mmol/L,represented with Treatment K3,K8 and K13) in nutrient solution for soilless culture on the plant height,stem diameter,leaf area and leaf number of tomato was studied in Feb.~Jun.of 2010.[Result] The stem diameters and leaf areas of tomato plants in Treatment K8 were extremely significantly bigger and their plant heights and leaf numbers were significantly bigger than that in Treatment K3 and K13.On Jun.12th,2010,the average stem diameters,average leaf areas,average plant heights and average leaf numbers of tomato plants in Treatment K3,K8 and K13 were 1.010,1.339 and 1.032 cm;0.262,0.291 and 0.191 m2;93.48,112.65 and 101.13 cm;14.0,16.5 and 14.3 resp.[Conclusion]The nutrient solution with potassium concn.8 mmol/L of for soilless culture was more suitable for the growth of cherry tomato.