DOI: 10.5593/SGEM2016/B32/S13.024


A.I. Pop, T. Rusu, B. Ileana, P.I. Moraru, B.M. Duda
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-62-9 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 2, 185-192 pp

Tillage systems are in direct relationship with weed control in soybean, wheat and maize crops, so that there are differences between the three modes studied, conventional tillage (CT), minimum tillage (MT) and no tillage (NT) in terms of weed seeds spread in the soil and their development. In the case of the variants MT and NT compared with the control variant a growth of the weeding degree by 15-37% was distinguished for the soybean crop by 18-30% for wheat and for maize by 23-59%, explainable by the lower ability to compete with weeds in the first phase of vegetation. Influence of tillage systems on the degree of soil structure’s hydro-stability highlights a significant increase in the case of MT and NT for wheat and maize crops, except for the soybean crop tilled with paraplow with no significant differences recorded and for NT system were increases of 3.1% compared to control variation were recorded. The content of humus has a tendency to increase on the depth of 0-10 cm up to 0.25% for NT. In terms of soil moisture one can observe a slight increase in the MT case and an obvious increase in the cast of NT with differences between 9-15%v. The soil temperature is rising with 0.5-10C for NT compared to CT. The lowest values for soil respiration are recorded at the wheat crop compared with soybean and maize with values between 1611-1792 mmol m-2s-1. The highest values between 1998-2268 mmol m-2s-1 are recorded at the maize crop at harvest but also with large differences between modes of tillage, so as a decrease at NT variant of 270 mmol m-2s-1 is recorded compared with the CT. Soybean production in the case of MT and NT is lower with values between 2176-2288 kg/ha. Wheat crops have declined by 3.1% which represents insignificant differences when using the MT system and 8.9% when using the NT system. Production differences were largest at the maize crop of 871 kg/ha compared to the control, because of uneven emergence and its lower ability to compete with weeds compared to the other studied crops.

Keywords: minimum tillage, no-tillage, weed control, soil fertility, production.

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