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采用田间调查、小区试验及生理生化分析相结合的方法研究钙与苹果果实生理性病害发生的关系及其防治机理。结果表明 ,与健康果比较 ,发病果全钙含量及水提取态和 1mo L/ LNa Cl提取态钙含量大为减少 ,果实氮 /钙比、果胶甲脂酶 ( PEA)活性、超氧化物歧化酶 ( SOD)和过氧化物酶 ( POD)活性及丙二醛 ( MDA)含量较高。幼果期喷钙显著增加了单果重 ,降低了苦痘病发病率 ,改善了苹果品质 ,并可增加果实全钙、水提取态和 1mo L/ L Na Cl提取态钙组分 ,降低果实氮 /钙比、PEA、SOD和 POD活性及丙二醛 ( MDA)含量
Field investigation, plot test and physiological and biochemical analysis were used to study the relationship between calcium and physiological occurrence of apple fruit and its control mechanism. The results showed that compared with healthy fruit, the content of total calcium and water extract of fruit and the content of calcium in extract of 1mo L / LNa Cl decreased greatly, and the ratio of N / Ca, PEA and superoxide Dismutase (SOD) and peroxidase (POD) activities and malondialdehyde (MDA) content were higher. Spraying calcium in young fruit increased significantly the weight of single fruit, reduced the incidence of bitter pit disease, improved the quality of apple, increased the content of total calcium and water, and the content of calcium extracted from 1 mol L / L NaCl, and decreased the content of nitrogen / Ca ratio, PEA, SOD and POD activities and MDA content