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在不同地方,不同钙、镁含量水平的菜园土壤进行菜心钙、镁肥田间试验。根据20个试验点的钙肥试验和15个试验点的镁肥试验结果,分别建立菜心相对产量与土壤交换性钙、镁含量的回归方程。研究结果表明:菜心产量与土壤交换性钙、镁含量分别呈抛物线相关;在质地为中壤土的菜田上种植菜心,土壤交换性钙的适宜含量为4.26￣9.60cmolL-1,交换性镁的适宜含量为2.01￣2.31cmolL-1;在参试的所有菜田中,施钙肥增产显著的菜田占50%,增产率为0.65￣33.8%;施镁肥增产显著的菜田占47%,增产率为-1.6%￣34.7%。
In different places, different levels of calcium and magnesium in vegetable garden soil cabbage calcium and magnesium fertilizer field trials. According to the results of calcium fertilizer test at 20 test sites and magnesium fertilizer test at 15 test sites, regression equations of relative yield of Ca (subscript 4 -) and soil exchangeable calcium and magnesium were established respectively. The results showed that the yield of cabbage and the exchangeable calcium and magnesium contents in the soil were parabolic respectively. The suitable content of soil exchangeable calcium was 4.26 ~ 9.60cmolL-1 in exchangeable magnesium The suitable content of 2.01 ~ 2.3.1cmolL-1; in all the vegetable fields tested, the yield of fertilizers increased significantly by 50%, yield increased 0.65 ~ 33.8% , Yield increase of -1.6% ~ 34.7%.