Investigations about sowing of oilseed rape with combine-seeder technique
Oilseed rape can be sown in one operation with the combine-seeder during the harvest of wheat. Advantages are: substantial lowering of the costs of labour and the working time needed, sowing into stubbles, therefore no problems with straw, sparing of the supplies of soil water, very good erosion protection, and lowering of herbicide costs is possible. The combine-seeder technique is only effective for special cutter bar widths and combine types. After sowing the shredded straw falls on the soil surface and the plants has to grow through the straw layer. This can result in a long hypocotyl with negative effects on hibemation. This problem can be reduced by a suitable straw management (good cutting up, distribution and rolling of the straw), by cultivation of robust and winter-hard varieties, the application of azol-fungicides in autumn, and seed dressing with SAT 2002 (active substance metconazol).The advantages of the combine-seeder technique can only be achieved if similar high and safe yields are obtained compared with conventional tillage. The combine-seeder was successfully tested in altogether eight experiments from 2003-2005 at different farms in Mecklenburg-Vorpommem, Germany. The tests were carried out with the varieties Talent, Baldur, Smart and the semi dwarf hybrid PR45D01. Hybrids were sown at a seed rate of 60 seeds per m2 and conventional varieties (Smart) at 70 seeds per m2.Compared with yields of standard minimum tillage (twice cultivator, seeder) the combine-seeder had slightly lower yields (3-5 per cent). Further research needed to be done for the optimization of nitrogen fertilization in autumn and the effective control of weeds and field mice.
Oilseed rape combine seeder minimum tillage straw management seed dressing
Ralf-Rainer Schulz
State Research Centre of Agriculture and Fishery of Mecklenburg-Vorpommern, Dorfplatz 1, D-18276 Gülzow, Germany
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
993-994
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）