永平县具有种植冬季亚麻所需的温度、湿度和充足的日照条件,生产的冬季亚麻原茎产量高,亚麻纤维质量好,综合出麻率高,故其市场竞争力较强.结合当地气候、土壤等自然条件,永平县总结出了优质冬季亚麻栽培技术,现将技术要点总结如下. 1 选地整地 选择地势平坦、土壤肥沃、排灌方便的砂壤土或鸡粪土为宜.因亚麻种子小,萌发时顶土能力弱,故播种前要求种植亚麻的田块施足基肥后精细整地,开沟理墒,使墒面土壤疏松细碎,墒面宽180～200 cm,沟深20 cm,沟宽30 cm.做到田平、土细、沟直.

The relationship between different sowing time of winter flax and straw yield,seed yield and technical length,ect was studied in this paper.The results showed that it was a proper sowing time to get a good yield around the 10th in October in Yunnan province,if sowing time was postponed,plant height and technical length would become shorter,stem diameter would become thinner,single stem weight would become lighter,the weight of a thousand seeds would become lower,and straw yield,seed yield would decline obviously.

Control efficacy of 5 agrochemicals to flax Rhizoctonia solani in winter in field was studied.The results showed that the seed dressing treatment with wettable powders of 70% thiophanate-methyl,50% thiram,75% chlorothalonil and 50% carbendazim had effective control on flax Rhizoctonia solani.in winter,the dosage for each agrochemical was 0.3% of the amount of seeds.And the application of 70% thiophanate-methyl 800 times liquid,50% thiram 500 times liquid,50% carbendazim 500 times liquid and 75% chlorothalonil 800 times liquid had effective prevention and control to the harm of flax Rhizoctonia solani.in winter.