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我县土壤多属钙质紫色土,碳酸钙含量高,使土壤有效锌转化为难溶性的氢氧化锌和锌酸钙而导致有效锌含量低;据化验,平均含锌仅0.085ppm。柑桔缺锌影响生长发育和适龄结果。我们从1982年到1983年进行了柑桔施角硫酸锌试验。试验结果表明,在钙质紫色土地区施用硫酸锌有促进柑桔适龄结果和提高座果率的作用,从而能增加产量。高滩公社五龙果场70亩柑桔施用硫酸锌后取得可喜成果。五龙果园从1975—1977年陆续定植柑桔树7,500株,有6,000株未挂果或挂果极少。1983年
Most of my county soil is calcium purple soil, calcium carbonate content is high, so that the effective soil zinc into insoluble zinc hydroxide and calcium zinc and lead to low effective zinc content; According to the test, the average zinc content of only 0.085ppm. Zinc deficiency in citrus affects growth and age-related outcomes. We conducted citrus angle zinc sulfate test from 1982 to 1983. The results showed that the application of zinc sulfate in calcareous purple soil region can promote the citrus age-appropriate results and improve the fruit set rate, which can increase the yield. Gobang commune Wulong fruit field 70 acres of citrus achieved good results after zinc sulfate. From 1975 to 1977, Wulong Orchard has successively planted 7,500 citrus trees, with 6,000 unripe fruits or few fruiting fruits. 1983