【摘要】 本文着重于讨论下蜀黄土起源的水稻土在稻麦轮种下土壤酸碱度和氧化还原电位的变化。 水稻土的耕层土壤酸碱度和氧化还原电位具有季节性的变化。水稻生育期大部分时间渍水,土壤处于还原态条件,土壤酸碱度为中性;旱地时土壤酸碱度和氧化还原电位状况通常是弱酸性和氧化态。渗育层下段终年为氧化态和接近中性。这些是与水稻土剖面的发育密切相关。更多还原

【Abstract】 This paper discussed the changeability of the pH and Eh values in paddy soils(originated from Xia-Shu loess)at rice-wheat(or rade) system.The paddy soils have a seasonal variation in topsoil pH and Eh,and submerge for most of the rice-growing period,where pH and Eh is neutral in reaction in the reduced condition, and pH and Eh of the dryland are usually subacid and oxidized.The percogenic horizon is near neutral and oxidized condition at cycle.This is closely connected with the profile development of the paddy soil.更多还原