关于稻田施用石灰的研究

本文对稻田施石灰的研究进行了综述。内容包括稻田水—旱轮作和施石灰对土壤pH、Eh和氧化还原物质的影响;施石灰对土壤微生物和有机质、氮、磷、钾及微量元素转化的影响;施石灰对土壤物理性质及大、小麦和水稻生长发育的影响。提出稻田土壤pH值达5.6及其以上不必对水稻施石灰,土壤pH在5.5以下,可根据土壤的缓冲性能在水稻移栽前结合稻草还田或翻压绿肥施石灰。最好在稻田轮作的旱作期将石灰施在旱作物(如大、小麦)上。

A REVIEW ABOUT STUDIES ON LIMING OF PADDY SOIL

This article present a brief review on liming of paddy soils. It covers the effects of liming and process of waterlogging-drainage. on pH, Eh and reducing materials of paddy soils; and the effects of Liming on soil microbe, orkanic matter, nitrogen, phosphorus, potassium, microe-lements transformation, properties of soil physics and the growth of upland crops (such as barley, wheat) and rice in daddy field.From above, it could be concluded that litne is not necessary for rice production when soil pH is over 5.6, but when below 5.5 lime may be applied in comuination with apolication of organci manures before transplantation with consideration of soil buffer capacity. It's best to apply lime to upland crops in the rotation of paddy field.