在水旱轮作下，施用有机肥有利于紫色水稻土铁—腐殖质复合的形成。
Organic manure application favours the formation of Fe-humus complexes in purple paddy soils under water-dry rotation.
阐述了水旱轮作的必要性及其优点；分析了水旱轮作的理想土壤水理条件；提出了水旱轮作的应急措施。
This paper discusses the necessity and advantage of paddy and drought farmland alternation culture and analyzes the ideal soil water physical conditions.
水旱轮作是我国重要的作物种植系统，在确保作物稳产、高产和提高种植业经济效益方面具有重要的地位。
Paddy-upland rotation is a main crop cultivation systems and has an important position in ensuring crops stable yield, maintaining high yield and improving planting economic benefit in China.
水旱轮作是我国重要的作物种植系统，在确保作物稳产、高产和提高种植业经济效益方面具有重要的地位。
Paddy-upland rotation is a main crop cultivation systems and has an important position in ensuring crops stable yield, maintaining high yield and improving planting economic benefit in China.
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