Effects of Sea-Sourced Calcium Fertilizer Dosage on Growth and Nutritional Quality of Chinese Cabbage
In order to find out the optimal calcium fertilizer dosage and improve nutritional quality of Jiaozhou Chinese cabbage,'Jiaobai 1'was used as the test variety,and 15-15-15 N-P-K compound fertilizer was applied as base fertilizer with an amount of 750 kg/hm2.Five dosages of sea-sourced calcium fertilizer CaO,0,150,300,600 and 1 200 kg/hm2,were set to analyze growth status and nutritional quality of Chinese cabbage.The results showed that the application dosage of 300 kg/hm2 had a positive impact on Chinese cabbage growth indicators including yield,relative chlorophyll,primary light energy efficiency of photosystem II(Fv/Fm),plant type ratio,utilization of calcium fertilizer,and CaO partial productivity.The Chinese cabbage was abundant in large and medium elements.Redundancy analysis showed that the Chinese cabbage yield and contents of total P,K,Ca and Mg were significantly positively correlated with the calcium fertilizer dosage.Fitting results of the structural equation model indicated that the calcium fer-tilizer affected contents of total Ca and Mg,then contents of total K and P,and promoted the yield.CaO application of 300 kg/hm2 is recommended in the high-quality,high-yield,and high-efficiency production mode of Jiaozhou Chinese cabbage.
Jiaozhou Chinese cabbagesea-sourced calcium fertilizernutritional qualityredundancy anal-ysisstructural equation model
万方数据
维普
