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稀土含有镧系元素为主的17种金属元素，“六五”期间全国稀土农用协作网的试验表明，苹果树喷布500—100mg／kg稀土浓度1—2次，可增产5％一ZI％’‘’。丁维新曾报道，在土壤PH6—10范围内，可溶态稀土含量随PH升高而降低“‘。因此，我们进行了喷布稀土溶液对轻盐碱土苹果树?
Rare earth contains 17 kinds of lanthanide-based metal elements, “Sixth Five-Year” period of the national cooperation network of rare earth agricultural trial shows that the apple tree spray 500-100mg / kg rare earth concentration of 1-2 times, an increase of 5% of a ZI% ’’. Ding Weixin reported that in the range of soil PH6-10, the soluble rare earth content decreases with the increase of PH. "Therefore, we conducted a spray of rare earth solution on the light saline soil of apple trees?