Gemma et al. (2000) pointed out tha

Gemma et al. (2000) pointed out that Ca contents in leaves and fruits on those pear trees planted in volcanic soil were not more than those planted in alluvial soil, but the watercore incidence of fruits was slighter from those planted in alluvial soil. Our results also showed that there was no correlation between Ca content in leaves or soil and the browning disorder severity of fruits. It implied that there must be some other factors which were more important than Ca deficiency to induce browning disorder of fruits. Unlike Ca content, Mg content in fruiting spur leaves showed highly correlated with browning disorder severity (Table 2). The Mg content was also reflected by the content of MgO in soil (Table 3). All of these results pointed to the conclusion that we should take more attention on MgO application in soil management when we deal with the browning disorder. It should be more effective than CaO fertilization to decrease the browning disorder in pears.

結果 (繁體中文) 2:

Gemma等人（2000年）指出，在火山土壤中種植的梨樹的葉子和果實中，果子含量不超過沖積土中種植的梨樹，但果實的含水量卻比在沖積土中種植的果實少。研究還表明，葉子或土壤中的Ca含量與果實的褐色紊亂嚴重程度之間沒有相關性。它意味著，必須有一些比Ca缺乏更重要的其他因素，以誘發水果的褐色紊亂。與Ca含量不同，果果刺激葉中的Mg含量與褐色紊亂嚴重性高度相關（表2）。土壤中MgO含量也反映了MgO含量（表3）。這些結果都得出了這樣的結論：在治理褐變病時，應更多地重視MgO在土壤管理中的應用。它應該比CaO施肥更有效，以減少梨的褐色紊亂。

結果 (繁體中文) 3:

Gemma等人。（2000）指出，在火山土上種植的梨樹葉片和果實中鈣含量不高於沖積土上種植的梨樹，但在沖積土上種植的梨樹葉片和果實中鈣含量較沖積土上種植的梨樹稍低。結果還表明，葉片和土壤中鈣含量與果實褐變程度無相關性。結果表明，果實褐變的誘因除鈣缺乏外，還可能有其他因素。與鈣含量不同，果距葉片中鎂含量與褐變嚴重程度呈高度相關（錶2）。土壤中鎂的含量也反映了鎂的含量（錶3）。這些結果表明，在處理褐變問題時，應重視MgO在土壤管理中的應用。降低梨褐變病的效果應優於CaO施肥。