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Publication datasheet
Influence of a vertical cutting device on Brassica napus seed loss in direct combining
Pari, L.; Fedrizzi, M.; Assirelli, A.
ENG, eng
3rd World Bioenergy, Jönköping, Sweden, 27-29 May 2008
Kind of publication:
Abstract in Italian:
Abstract in English:
EU requires that by 2010 5.65% of diesel fuel must be of vegetable origin. To reduce Italian depend- the humidity content at harvest and the behaviour and ence from imported palm oil, it is necessary to increase national production of vegetable oils: together with sun- effectiveness of the proposed conditioning system were flower and soybean, canola (Brassica napus or Brassica napus oleifera) is an interesting possibility to satisfy vegeta- found on the experiments carried out. ble oil demand, that is rapidly increasing for its use in biodiesel production. In Italy potential areas are available for On the contrary, the cutting device confirmed a high the cultivation in relation to adequate rainfall and mild winters, that are very promising factors for canola production. efficiency and accuracy on the various work conditions However, the long period of seed maturity, non uniform growth, natural dehiscent process and variable weather con- tested, even with stems that had basal diameters of near ditions, such as wind and rain, are some of the factors which can lead to large seed losses: this is the main problem 40 mm. limiting this specie diffusion. Amongst available harvesting techniques, direct harvest of canola is an hazardous prac- The first experiments revealed some specificity on tice because there are several important questions related to it. The success of canola may depend on research initia- the cultivation that suggest for further experimentations tives to reduce some of the obstacles associated with its growing. The objective of this study is to determine if differ- in order to improve the functionality and integration be- ent cropping heads in direct combining can reduce seed losses. In Northern Italy (Piedmont) the trials were con- tween the cutting device and that of the conditioning. ducted in a 16 ha canola cultivation, in which was seeded the “Lion” variety of canola. In order to realize direct har- Based on the obtained results of the experimentation vest, the combine cylinder speed was regulated as slow as possible (500 rpm), the concave was opened at 3/4 of the of 2007, the CRA-ING of Monterotondo (RM) has de- way (about 25 mm clearance) and the fan speed was set at 2/3 of small grain settings (800 rpm). Only one combine signed a model with a greater operative capacity in order was used for the trials, a New Holland CX 9080, in order to avoid any influence on seed losses. The combine was to meet with the demands of constructors and operators equipped with two different cutting heads: a common wheat type (type 1) and another, similar to the first, but of the sector; the model is presented in a schematic form equipped with vertical cutting devices on both ends of the head (type 2), because the plants are very dense and en- on Figure 4. tangled. The losses of seeds were measured with appropriate binders on the ground. The binders were placed so as to measure the seed losses differences all along the cutting head width. The test was repeated four times in different 2 places of the farm. Each time 500 m of cultivation were harvested. The results of the test show that the seed losses caused by standard cutting head (type 1) are in total 18% higher than losses caused by modified cutting head (type 2). Moreover the cross-sectional distribution of the losses is more homogeneous in the modified cutting head respect to the other one: that is due to the presence of the vertical cutting devices that don’t tear the cultivation during the advance of the machine.

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