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在日光温室内,采用基质栽培模式研究多功能药肥对微型种薯晚疫病的防效以及最佳施用量,结果表明:多功能药肥施用量与微型种薯晚疫病相对防效、生物学性状、经济性状呈正相关,与微型种薯晚疫病病情指数呈负相关。随着多功能药肥施用量的增加,微型种薯产量在增加,但单位多功能药肥的增产量则随着多功能药肥施肥量的增加而递减,出现报酬递减律。经回归统计分析,多功能药肥经济效益最佳施用量为0.20 kg/m2时,微型种薯理论产量为2.19 kg/m2,计算结果与田间试验处理5相吻合。
In the solar greenhouse, the matrix cultivation mode was used to study the control effect of multi-functional fertilizer on the late blight of miniature potato seedlings. The results showed that the application of multi-functional medicinal fertilizer was relatively controllable against the late blight of miniature potato, There was a positive correlation between traits and economic traits, and a negative correlation with disease index of late blight of miniature potato. With the increase of multi-functional drug application, the yield of miniature seed potato is increasing. However, the increase of unit multi-functional drug fertilizer decreases with the increase of multi-functional fertilizer application, and the law of diminishing returns appears. After regression analysis, the theoretical yield of mini-seed potato was 2.19 kg / m2 when the optimum economic benefit of multi-functional medicine was 0.20 kg / m2. The calculated result was consistent with that of field experiment.