免耕水稻早发及产量形成特性研究

THE MECHANISM OF THE EARLY PERIOD TILLERING PREVALENCE OF NO TILLAGED RICE AND ITS YIELD FORMATION

研究了免耕水稻早发及分蘖成穗特性，结果表明：免耕水稻的早发性，与免耕水稻浅插关系密切．栽插深度对不同耕法水稻分蘖性的影响有明显差异，免耕浅栽水稻具有稳定的分蘖成穗特性，成穗率高，在常规密度栽培下，其单株籽粒产量比耕翻浅栽、免耕深栽和耕翻深栽分别高４．７％、１５７％和２４９％．水稻的免耕栽培，充分利用了水稻浅插的正效应．

The effects of the four combinations of two tillage methods and two transplanting depths of rice were studied on the tillering pattern and yield of rice. The results showed that no tillaged rice with shallow transplanting had a early period prevalence of tillering and the prevalence, resulting in a higher percentage of effective tillers, resulted from the co regulation of shallow transplanting and favourable soil conditions under no tillage. The yield of the no tillaged rice with shallow transplanting was increased by 4.7%, 15.7% and 24.9%, respectively, compared with those with conventional tillage shallow, no tillage deep and conventional tillage deep transplanting. Therefore, the shallow transplanting companied with no tillage played an important role in increasing rice yield.