【摘要】 于1986～1988年对夏播芝麻氮、磷、钾肥的施用量,合理配比及使用方法进行了研究,结果表明,河南省夏芝麻产区的土壤肥力差异较大,必须因土施肥。一般施肥量应为:N90～120kg/hm²,P₂O₅45～60kg/hm²。土壤速效钾含量120mg/kg为施钾临界值,低于此值时施钾有效。施肥方法以氮肥底施加追肥,磷、钾肥全部底施的增产效果最好。土壤中Fe、Mn、Cu等微量元素尚能满足芝麻需求,但Zn、Mo、B表现出潜在缺乏,应予补施,以促进芝麻营养的平衡吸收。更多还原

【Abstract】 The rational rates and methods of N, P and K fertilizers for summer sesame were studied, understanding on the basis of the rules of nutritive absorption and dry matter accumulation. The status of some kinds of trace elements and its fertilization were studied simultaneously. The results indicated that fertilization according to soil fertility should be emphasized because of the larger difference of soil fertility in sesame production area. Suitable application rate of N and P fertilizers is 90-120 kgN/hm2and 45-60kgP2O5/hm2. Applying K fertilizer had effect On Sesame increase yield while the available K2O in soil was iower than 120mg/kg, which the value could be considered as critical index. The methods of combining 1/3 of N as basal application can achieve the best result. In summer sesame production and 2/3 of N as dressing, and all of P and K fertilizers as basal application can achieve the best result. In summer sesame production area of Henan province, Fe , Mn and Cu in soils can meet the needs of sesame growth, but Zn, Mo had appeared latent deficiency under the yield level of 1.05-1.50 t/hm2.更多还原