论文部分内容阅读
大田栽培向日葵主要分为干果食用型、油用型、中间型(食用、榨油均可)3类,另外向日葵还有大田复播油葵作绿肥,或作为观赏植物等用途。1.播前准备选地与整地:向日葵对前茬作物有所选择。因向日葵需肥多,特别是钾肥的需要量大,同时若连作会造成菌核病和灰象甲、列当寄生草为害加重。因此,要做好轮作倒茬,如小麦、油菜、甜菜、草木樨等前茬最佳。
Field cultivation Sunflower is mainly divided into dried fruit edible type, oil type, intermediate type (food, oil can be) three categories, in addition to sunflower oilfield sunflower sowing for green manure, or as ornamental plants and other uses. 1. Pre-sowing and land preparation: sunflower on the stubble crops have a choice. Due to the need for more sunflower, especially the large amount of potash, at the same time if the continuous crop will cause Sclerotinia and ash weevil, parasites listed as parasitic aggravated. Therefore, to do the crop rotation, such as wheat, rape, sugar beet, mulberry and other pre-crop best.