摘要
成用土壤常规分析,吸附试验和指示作物盆栽相结合的诊断程序,以高粱为栽种作物对土壤的养分障碍因子进行系统诊断。结果表明:供试的青紫泥田土壤养分缺乏的顺序依次为P>N>K>S,微量元素相对充裕;黄筋泥田土壤的主要限制因子为活性酸,当土壤中施入适量CaCO_3后,各养分元素的亏缺顺序表现为P>N>K>Mo>Zn;小粉土主要缺N、P和K,缺Mg的减产效应与缺K接近,微量元素Mn和Zn也在一定程度上显示不足。应用系统诊断程序,可快速、准确地监测土壤中作物养分限制因子的存在和相对亏缺顺序,为建立高效益的肥料田间试验和作物高产研究提供依据。
To identify the soil fertility constraints, the systematic approach was used, which mainly contains routine soil analysis, sorption study and greenhouse pot experiment using sorghum as an indicator plant. Results showed that in the waterlogged paddy soil (Shaoxing) the degree of nutrient-deficiency was in the following decreasing order of P, N K, and S; the micronulrients were in relatively adequate status', paddy soil derived from quaternary red clay (Jinhua), the factor limiting the yield was active acid, when the soil PH was adjusted to a near optimum status, the plant nutrients with limiting effects were in a decreasing order of P, N, K, Mo and Zn. While in the silty loam ( Xiaoshan) N, P, K, and Mg were the four major limiting factors, and Mn and Mo were also found to be the soil fertility constraints to a certain degree. The diagnostic procedure used in this paper was suggested to be adopted as a guideline for eatablishment of field fertilizer test and Maximum Yield Research.
出处
《浙江农业学报》
CSCD
1992年第1期31-37,共7页
Acta Agriculturae Zhejiangensis
关键词
土壤分析
养分
障碍因子
系统诊断
Soil analysis
Sorption study
Pot experiment
Fertility constraints
Systematic diagnosis
