The field fertilizer tests with 3414 Model recommended by Ministry of Agriculture were studied by fertilizing Nitrogen,Phosphorus and Potassium in flax fields in winter.The results showed that Nitrogen,Phosphorus and Potassium all had effect on straw,seed and fibre yields of flax.Compared with other treatments,the non-nitrogen treatment was significantly different.Regression models were established on the basis of the three-factor-quadratic functions,the fitting degrees were good.These models could provide a reference for practical production.

Control efficiency of 6 pesticides to flax anthracnose in winter field was studied.The results showed that the seed dressing treatment with wettable powder of 60% Tanjuling or 50% carbendazim had effective control on flax anthracnose.The control efficacy of 60% Tanjuling 500 times liquid,80% ziram 800 times liquid,50% carbendazim 500 times liquid or 70% thiophanate-methyl 800 times liquid was also good.

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.

<正>为探索柑橘生产中肥料的合理施用,提高柑橘果实品质和产量,我们于2007年至2008年进行了钾肥在柑橘上的施用试验研究。

<正>宾川县地处金沙江干热河谷地区,全县柑橘种植面积达4746.66hm2。由于优越的自然环境条件,宾川柑橘以果大、色泽金黄、味甜畅销中国西南地区。但近年来广大果农为追求经济效益,对化肥、农药过度依赖,致使部分柑橘园营养失调,影响了宾川柑橘

山药属薯蓣科,薯蓣属植物.草质缠绕藤本,茎左旋,单叶互生,盾形,叶面常有不规则斑块状的灰白条纹,边缘浅波状,基部心形.花雌雄异株或同株,雄花序穗状,3～6朵簇生,花被紫红色,雌花序总状穗状.蒴果三棱,干枯后呈黄褐色.种子褐色,尾部着生膜状翅1片.