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1材料与方法1．l试验材料：本试验于j1993年3月上旬～6月下旬在泰安市粥店办事处更旺村及本校实习农场两地进行。供试微肥为河南商丘生产的“常乐益植素”，马铃薯品种为克新2号。3月上旬播种，召月中旬卉苗，5月上旬现营。试验地土壤为沙埃主，养分含量平等，前茬作物为花生，
1 Materials and methods 1. l Test Materials: This experiment was conducted from January early 1993 to late June 1993 in Wangcun Village and Taiyuan Internship Farm in Tai’an City. Test fertilizer for the production of Henan Shangqiu “Changle benefit plant,” potato varieties for the new Kexin. In early March sowing, call the mid-October Hui Miao, early May is camp. Soil test for the sand main, equal nutrient content, the former crop of peanuts,