摘要
Ｍｅｈｌｉｃｈ３试剂（简称Ｍ３）是适用于多类土壤、多种大量和微量养分元素测试的通用浸提剂，但对石灰性土壤尚少与生物相关研究的报道。本文以微钵栽培番茄和甜菜的微量元素吸收量及常用法测试值为参比项，对Ｍ３－ＩＣＰ法用于京、冀石灰性土壤作了较详细的相关研究。结果表明，Ｍ３－Ｂ、Ｃｕ、Ｆｅ、Ｋ、Ｍｎ、Ｐ、Ｚｎ值分别与对应的常用法测定值都有极好相关性。Ｍ３－Ｂ、Ｃｕ、Ｍｎ、Ｍｏ、Ｚｎ、Ａｌ、Ｍｇ、Ｎａ值与两种植物的对应元素吸收量都有好相关；Ｍ３－Ｂａ、Ｃａ、Ｃｄ、Ｃｏ、Ｃｒ、Ｎｉ值与一种植物的吸收量有显著相关；Ｍ３－Ｆｅ、Ｐｂ、Ｔｉ值则没有统计学的显著相关性。此外，该法还有多项其它优越性。同时，对于Ｍ３法的机理和问题也作了探索。研究结果打破了我们长期以来关于“酸性浸提剂不适用于石灰性土壤测试“的观念，为我国土壤测试方法提供了一种统一通用浸提剂的可能性。
Mehlich 3(M3)reagent is applicable to a wide range of
soils for the determi-nation of both available macro-and micro-nutrients, perhaps to serve as an
universalsoil extractant. However correlation between M3 value of soil nutrient and
plantresponse to nutrient in field or pot experiment of calcareous soils was scarcely
stu-died.Using the micronutrient uptake of tomato and sugar beet seedlings cultured in
amico-pot experiment and the relevant conventional soil test values as reference terms,the
correlations between M3-ICP values of the calcareeous soils in Beijing and He-bei and the
reference terms were studied in the present work.The results indicatedthat there were
significant correlations between the values of M3-B、-Cu、-Fe、-K、-Mn、-Pand-Zn and the
values of corresponding conventional methods.Significant correla-tions were also found
between the values of M3-B、-Cu、-Mn、-Mo、-Zn、-Al、-Mg and-Naand the corresponding
nutrients uptake of the seedlings for both the two plants ; andbetween the values of M3-Ba、
-Ca、-Cd、-Co、-Cr and-Ni and the correspondinguptake of the seeding for one plant, but no
statistically significant correlation wasobtained for values of M3-Fe,-Pb
and-Ti.Furthermore,M3-ICP method had manyother advan tages when it served as an universal
soil extractant.Mechanisms andthe several relevant problelns are also discussed.The concept
of acidic extractantbeing not used as a good soil extractant on calcareous soil should be
questioned,andM3 reagent possibly could be used as an universal extractant of acid,neutral
andalkaline(calcareous)soils in China.
出处
《土壤学报》
CAS
CSCD
北大核心
1995年第2期132-141,共10页
Acta Pedologica Sinica
关键词
石灰性
土壤
土壤浸提剂
Mehlich 3 universal soil
extractant.Calcareous soil, Correlationstudy
