摘要
3年连续试验表明,用最佳组合与浓度500ppm稀土+500×复合液肥,对苹果进行根外追肥,可使叶绿素增加22.31％,百叶重增加21.59％,百花序座果数增加85.57％,产量增加20％以上,Vc增加35.79％。该肥用量少,见效快。使用方便,成本低廉。尤其在土壤渗漏严重,有机肥解决困难的砂地条件下根外施用,更有特殊意义。根据3年效益计算,10年生金冠苹果每年每亩用于药品、人工和机具的投入约30元,以亩产500kg的中低产园计算可增收150元,投入产出比为1∶5。其经济效益和社会效益将随着单产的提高和使用面积的扩大而相应增长,因此适于大面积推广。
Three years' consecutive tests have proved that foliage spray applied to apple trees with the combination of the optimum concentration of 500ppm rare earth and 500×composite liquid fertilizer can increase the chlorophyll content by 22.31％, the weight of 100 leaves by 21.59％, the number of fruit setting per hundred inflorescences by 85.57％, the yield by over 20％ and Vc by 35.79％. This fertilizer has the advantages of small dosages, quick results, easy use and low cost. Its foliage sprayapplication is especially suitable for sandy areas with serious percolation of the soil and lack of organic fertilizer. According to the calculation based on three years' beneficial results,the cost of chemicals, man power and implements for each mu of 10-year-old Jin Guan apple trees each year is approxomately 30 yuan, while the income of a medium or low yielding orchard with an output of 500 kg can be increased by 150 yuan; thus, the ratio between investment and output is 1 : 5. The economic and social benefits of the use of this fertilizer greatly develop with the increase of per unit area yield and the expansion of its use, and, therefore, it is suitable for extensive application in large areas.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1991年第1期43-51,共9页
Journal of Beijing Forestry University
关键词
苹果
施肥
稀土
复合施肥
砂地
rare earth, composite liquid fertilizer, apple, foliage spray, sandy soil
