红壤温州蜜柑园施用石灰对果实耐贮性的影响

Effect of Application of Limestone on Fruit Storabilityin Red-earth Satsuma Orchard

对红壤温州蜜柑园施不同用量的石灰石粉，经两年果实贮藏试验结果表明，贮藏１０３天，腐烂率较对照低５．３～１０．０个百分点，果实出库率高４．８～１３．１个百分点。石灰减轻果实腐烂率的作用贮藏初期随贮藏天数增加而增强，５８天后逐渐减弱，而环境等其他因于促进果实腐烂的作用增强，但这些因子对对照影响更明显，故使石灰石粉处理与对照腐烂率差距继续增大。贮藏１０３天后，石灰石粉处理和对照腐烂率均剧增。石灰石粉不同用量中，以每公顷１．５０～３．００ｔ处理的效果较好，贮藏１０３天，两年平均腐烂率比对照（１４．７％）低９．２～１０．０个百分点，出库率比对照（７４．２％）高９．５～１３．１个百分点。，达１％显著水平；贮藏１０３天和１１６天，ｒ值逐渐变小（见表１）。这说明，贮藏２０天时，施用石灰石粉对降低腐烂率的作用已经发挥，贮藏５８天左右时这种作用较明显，但以后随着时间的推移，其作用逐渐减小。１９９２／９３年温州蜜柑贮藏１０３天时，ｘ与Ｙ的相关系数ｒ＝－０．９８０，达１％显著水平；而１９９１／９２年果实贮藏１０３天时，ｘ与Ｙ相关系数ｒ３＝－０．８６６，未达５％显著水平，但ｒ与ｒ３进行比较假设测验时差异不显著，说明ｘ与Ｙ的相关程度两?

Various amounts of powdery limestone were applied to satsuma trees on red earth.The result of 2-year fruit storage test showed that the percentage of decay of the treated fruitwas lower than that of control by 5.3-10.0%, and the percentage of storage output washigher by 4.8-13.1%。 The effect of decay alleviation for treatmets enhanced with increasingstorage life , but it declined gradually after 58 days, After 103-day storage , the decay ratesof both treatments and control dramatically increased. Among all treatments , application of1.50-3. 00t powdery limestone/hm!2was most effective, the average decay rate for 2 yearswas lower than control(14.7%)by 9.2- 10.0%, and the rate of storage output was higherthan control(74.2%)by 9.5-13.1%。