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柳州野稻和长药野稻是本研究重要的宿根性状来源。已证明：宿根性是显性数量性状。这两个野稻的宿根性１９７７年经种间复交光粳Ａ／柳野∥长野而输入栽培稻，Ｆ１名为４０２０。这个Ｆ１有根状茎且宿根重现性特好，已在成都宿根生长、越冬１９年。成都常年１月平均气温５．４℃，极值－７．６℃。宿根系４０２０正用作主要亲本进一步选育宿根栽培稻。预计，早熟宿根稻６０天收割一次，年收数次使总产大增。宿根旱稻与三叶草间种，免耕，有厚层土表覆盖防水土流失。宿根稻区内有益生物和有害生物间形成自然平衡。从而减少农用化学品的施用。以最少的投入而收获够多的稻谷
Liuzhou wild rice and longan wild rice are the important rooting traits in this study. Proven: Perennial is a dominant quantitative trait. Rooting of the two wild rice In 1977, cultivated rice was input through the interspecific hybridization japonica A / Yanagia ∥ Nagano, and the F1 was named 4020. The F1 has rhizomes and perennial reproducibility is particularly good, has grown in Chengdu perennial, winter 19 years. The annual average temperature of Chengdu in January 5.4 ℃, the extreme -7.6 ℃. Perennial 4020 is being used as a primary parent for further selection of perennial cultivated rice. It is estimated that the precocious petiole will be harvested once for 60 days and its annual output will increase significantly. Perennial upland rice and clover interplanting, no-tillage, a thick layer of soil cover waterproof soil loss. Perennial rice area beneficial organisms and pests to form a natural balance. Thus reducing the application of agrochemicals. Enough to harvest enough paddy with minimal input