Detailed Explanation of Field Management Techniques for Rapeseed Cultivation

Rapeseed is a major oilseed crop in China, grown over an extremely wide area and an important cash crop. To achieve high and superior yields and greater returns, field management is extremely important. So how exactly should it be done? Follow the editor to take a look at the detailed introduction below.

1. Timely intertillage and weeding

Intertillage can prevent soil from becoming compacted or losing its moisture-retention capacity, and promotes the growth and development of the root system, especially after watering or the rainy season, when the soil readily becomes compacted and has poor aeration, and in severe cases the roots may die from lack of oxygen. Weeding removes the competition between weeds and rapeseed for water, fertilizer and growing space; too many weeds also make pest and disease damage more likely and can disrupt soil microorganisms, so weeding must be done promptly, ideally leaving no weeds in the field. Generally, intertillage and weeding should be carried out 3-4 times a year; when intertilling, follow the principle of shallow hoeing in the early and late stages, deep hoeing in the middle stage, and no hoeing before rain, while weeding should be done early and frequently.

2. Topdressing early

If rapeseed is to grow quickly and well, topdressing is indispensable; topdressing should be done early to promote early growth. Rapeseed needs little fertilizer at the seedling stage, but its fertilizer demand increases sharply after bolting, and fertilizer needs a certain amount of time to decompose before it can be absorbed by the plants. Therefore, attention must be paid to base fertilizer and timely topdressing to meet the fertility needs of rapeseed's reproductive growth; at the same time, during the peak growing season, foliar fertilizer should be sprayed to maintain the trace elements the plants need. In autumn, in combination with intertillage and weeding, apply 25 kg per mu of a compound fertilizer mainly based on potassium fertilizer to promote autumn growth. Before the beginning of spring, apply compound fertilizer once more to promote spring growth; after fertilizing, appropriate earthing up should be done to prevent lodging and improve fertilizer use efficiency.

3. Pest and disease control

Rapeseed has quite a few pests and diseases during cultivation. At the seedling stage, pests such as cabbage caterpillars, aphids, cutworms and mole crickets cause damage, and they can be controlled by spraying insecticides. Another disease that causes relatively serious damage at the seedling stage is downy mildew; drain promptly, or spray Roushuitong solution every other week for prevention. The main disease at the flowering stage is sclerotinia, and Roushuitong is likewise sprayed at the flowering stage for prevention; the diseases at the podding stage are white rust and aphids; aphids can be controlled by spraying trichlorfon, and white rust can be controlled by spraying Namixin.

The above is an introduction to field management for rapeseed cultivation. We hope it can help you. To learn more related knowledge, please stay tuned to us.