Effect of Soil Management and Applying Fertilizer Technique on Mutrient Balance and Physiological Barrier of Some Crops under Soils with Limiting Factors or Special Characteristics

Abstract

本計畫旨在解決地區重點作物土壤與作物之養分平衡問題、養分有效率及肥力之動態平衡等相關之品質產量與後熟品質問題等。包括地區重點作物土壤特性、管理之調查分析及作物性狀、營養特徵與產量間相關之調查分析與診斷；地區性土壤之水分、養分供應能量與強度因子分析，擬定初步作物營養生理障礙解決方案。 The objective of this project is to study the effect of soil management and fertilizer controll on increase of crop yields and quality, and establish the adaptive techniques in applying fertilizer and improvement of nutrient efficience and balance for soils with limiting factors or special characteristics. The field experiments has been conducted on sandstone and shale alluvial soils in the farm of TARI and other soils with limiting factors or special characteristics such as shallow depth soil, coarse texture, high P-fixation soil, nutrient unbalance in capacity and intentity. . The treatments for residue are composed of residue incorporation, residue burning and residue removal in the field experiments of TARI in order to compare the P efficience with that of black soil.under rice culture.. The other soil survey and field invetigation include soil pH, texture, drainage condition, exchangeable calcium and magnisium content, organic matter, micronutrient and balance of available nutrient. The effects of fertility and quality of irrigation water are also monitored in this study. It is expected with finishment of this project, techniques for appropriate soil management methods will be established to maintain the development of sustainable production with high crop qualitity. On the other hand, this research also study the effect of cropping, organic manure. green manure crop, and other soil managements on the changes of available nutrients, especially for the balance between soil nutrients