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• Effect of extreme crop year on soil moisture in maize

  35-40

  Lajos Fülöp Dóka

  Views:

  84

  We examined the change of the time of water balance of soil in 25 years old experiment, on chernozem soil, in different croprotation systems (mono-, bi- and triculture) in two extreme cropyear in 2007 and 2009 in maizestock.
  According to our findings the values of waterdeficit of soil of maizestock were about 100 mm before the sowing time that grew because of considerable deficit of precipitation and high average temperature in months of summer. Values of waterdeficit achieved at the end of August the maximum and lessed a little bit to end of crop time. Decrease of waterstock stopped because of irrigation treatments in irrigated plots but the difference between two irrigation treatments (Ö1-Ö3) vanishedat the end of summer, waterdeficit were higher with 17 mm in monoculture in irrigated plot than value of not-irrigated plot. Considerabler precipitation in Jun effected on waterbalance of soils of three of crop-rotation systems favourable, rapid waterloss starting to april began to lessenat the end of May and started to increase from early in July. Precipitation in Jun had positiv effect on yield also.

• Examinations of soil waterbalance in different crop-rotation systems of maize

  41-49

  Lajos Fülöp Dóka

  Views:

  88

  We examined the change of the time of water balance of soil in 25 years old experiment, on chernozem soil, in different croprotation systems (mono-, bi- and triculture) in dry (2007) and rainy (2008) cropyear in maizestock. According to our findings the values of waterdeficit of soil of maizestock were much smaller in 2008 than values of last year in not irrigated and irrigated plots of three of crop-rotation systems because of favourable supply of precipitation. We found difference between values of waterdeficit of two irrigation treatments. We measured smaller values in irrigated plots of three of crop-rotation systems before sowing.  Waterstock of soil started to decrease with the rising of average temperature and despite of increasing of precipitation quantity in this way we calculated higher values of waterdeficit. Precipitation in August and high average temperature intensified the waterdeficit. Waterdeficit achieved highest values of croptime to front of September. We examined waterbalance of soilprofile in 0-200 cm and we concluded that the waterdeficit of the 80-120 cm soilzone was most intensiv in not irrigated and irrigated treatments because of significant rootmass. 

• Examination of extreme water-balance of maize cultivar in different crop rotation systems in 2007

  33-40

  Lajos Fülöp Dóka

  Views:

  102

  We examined the change of the time of water balance of soil in long-term experiment, on chernozem soil, in different croprotation systems (mono-, bi- and triculture). We found the smallest difference between the water deficit of not irrigated and irrigated plots in triculture. We concluded that irrigation impressed favourably on water balance of soil in both of crop-rotation systems. Water deficit has decreased significantly after irrigation
  in 25. May in mono- and triculture. Irrigation moderated only values of water deficit. Irrigation in 30. June not influenced water balance of soil in both of crop-rotation because of a big drought. Water deficit of soil lessed till harvestperiod because of rainy season at the end of August and in September.