两种测土配方施肥方法的比较

Comparative study on two kinds of formulated fertifization

平衡施肥法和土壤肥力指标法是目前国内外普遍采用的两种测土配方施肥方法。本文以1987、1988二年在浙中丘陵地区水稻土上进行的大麦多点田间试验资料,研究磷素平衡施肥法中各项参数的确定及磷肥用量计算,该法与土壤肥力指标法确定的磷肥用量比较表明:平衡施肥法计算的施磷量受估计可得产量、土壤供磷量、磷肥利用率等因素的制约,故带有全定量的性质;而土壤肥力指标法是一种半定量方法,其按不同土壤速效磷测定值确定的施磷量与同一土壤平衡施肥法中上定产水平时的施磷量相当。

At present, in formulated fertilization the balanced fertilization method and soil fertility index method are widely utilized at home and abroad. Based on the data of multi-site field experiments of barley grown on rice soils in the hill region of the central part of the Zhejiang province in 1987 and 1988. determination of each parameter and calculation on fertilizer rate for P in the balanced fertilization were studied in this paper. Comparison between P fertilizer rates calculated from the two methods showed that the p fertilizer rate from the former was characteristic of a full quantitative because the P rate was restricted by the estimated barley grain yield. P amount from soil and P utilization rate by plants; While the latter Was a semi—quantitative method, its P rate come from different values of available soil P was equal to that of the balanced fertilization in which the planned yield was at medium level on the high side.