CAJ | 학술논문

以甘肃景泰叶片黄化梨园土壤为例，比较黄化和非黄化梨园0～20 cm和20～40 cm土壤微生物及养分，以探讨与梨树叶片黄化相关因子，为解决黄化问题提供科学依据。研究表明：黄化土壤细菌、放线菌数量都显著少于非黄化土壤的数量，浅层（0～20 cm）黄化土壤的细菌数量少于非黄化土的46.62％，放线菌数量少52.49％；深层（20～40 cm）黄化土的细菌数量少于非黄化土的78.22％，放线菌少50.13％。两者的真菌数量差异不显著。黄化土壤20～40 cm的有机质、全氮、全铁、全镁含量显著低于非黄化土壤和黄化土壤0～20 cm土层的含量。因此，梨树叶片黄化与土壤中细菌、放线菌数量减少、20～40 cm土层的有机质、全氮、全铁、全镁含量过低有关。建议重点增施黄化梨园20～40 cm土层的腐熟有机肥。
이감숙경태협편황화리완토양위례，비교황화화비황화리완0～20 cm화20～40 cm토양미생물급양분，이탐토여리수협편황화상관인자，위해결황화문제제공과학의거。연구표명：황화토양세균、방선균수량도현저소우비황화토양적수량，천층（0～20 cm）황화토양적세균수량소우비황화토적46.62％，방선균수량소52.49％；심층（20～40 cm）황화토적세균수량소우비황화토적78.22％，방선균소50.13％。량자적진균수량차이불현저。황화토양20～40 cm적유궤질、전담、전철、전미함량현저저우비황화토양화황화토양0～20 cm토층적함량。인차，리수협편황화여토양중세균、방선균수량감소、20～40 cm토층적유궤질、전담、전철、전미함량과저유관。건의중점증시황화리완20～40 cm토층적부숙유궤비。
The microorganisms and nutrients in the rhizosphere soil of leaf yellowing and normal pear trees in Jingtai County , Gansu Province were studied to find out the factors related with leaf yellowing .The results showed that bac-teria and actinomyce in soil of the leaf yellowing pear trees were significantly lower than those in the soil of normal trees.The bacteria and actinomyce in the shallow layer (0-20 cm) of soil in leaf yellowing orchard were 46.62%and 52.49%less than those of normal orchard;while in the deeper layer (20-40 cm) of soil of leaf yellowing pear orchard, bacteria and actinomyce were 78.22%and 50.13%less than those from normal orchard .There was no sig-nificant difference between the two kinds of pear trees in the amount of fungus .In 20-40 cm deep soil from the leaf yellowing pear orchard , the content of organic matter , total N, total Fe and total Mg were significantly lower than those from normal pear tree soil and those in 0-20 cm deep soil from the leaf yellowing orchard .Therefore, decrease of bacteria, actinomyce and organic matter , total N, total Fe and total Mg in 20-40 cm deep soil were the main fac-tors related to leaf yellowing .Thus, applying decomposed manure to soil of 20-40 cm deep in leaf yellowing pear orchards should be suggested .