几种钙肥在褐土中施用对小萝卜生长的影响

Effects of Several Types of Calcium Fertilizers Applied in Cinnamon Soil on Growth of Radish

通过盆栽试验研究了不同施钙水平的Ca O,Ca(OH)_2和CaSO_4在褐土中施用对小萝卜生长及土壤养分的影响,为小萝卜等蔬菜施用钙肥提供科学依据。试验结果表明:0.2,0.4和0.6 g/kg施钙量能增加小萝卜的株高、叶面积,0.8 g/kg施钙量有抑制作用;施钙处理的小萝卜硝酸盐平均含量比不施钙处理减少了31.8%,差异均达显著水平;小萝卜收获后,施钙处理的土壤中碱解氮、速效钾含量都低于空白处理,而土壤有效磷含量均高于空白处理,差异达显著水平;施用钙肥提高了土壤中交换性钙的含量,且随着施钙量的增加而增加;施钙处理显著提高了小萝卜产量,增产幅度在18.92%~66.00%。

Pot experiment is carried out to study the influence of applying CaO, Ca （OH） 2 and CaSO4 with different calcium levels in cinnamon soil on radish growth and soil nutrition, which is aimed at providing scientific basis for applying calcium fertilizer to radish and other vegetables. Experimental results show that calcium application amounts of 0.2, 0.4 and 0.6 g/kg can increase plant height and leaf area, calcium application amount of 0.8 g/kg has inhibitory effect ; the average nitrate content of radish treatment with calcium application reduces by 31. 8% than that without calcium application, the difference is significant; after harvesting radish, soil available nitrogen content and soil available potassium content are below that of control, while soil available phosphorus content is higher than that of control, the difference is significant; calcium application increases exchangeable calcium content in soil, and it increases with the increase of amount of calcium applied; calcium treatment increases radish yield significantly, increase rate is between 18.92% and 66.00%.