Long-Term Effects of Fertilizers on the Soil Fertility and Productivity of a Rice-Wheat System

Aims: the present study was designed to test the hypothesis according to which rootstock effects on scion growth and yield are related to fundamental physiological traits which are expressed consistently and independently of environmental conditions.Methods and results: Pruning weights and yield components from two independent rootstock experiments are reported. In the first experiment, the effect of two levels (30 and 70 kgN/ha/year) was studied during 15 years on Cabernet-Sauvignon vines grafted onto SO4 and Riparia Gloire de Montpellier (RGM). In the second one, Cabernet-Sauvignon and Merlot vines grafted on SO4 and RGM were submitted to two levels of soil fertility shortly after plantation: control and high (100 kgN/ha/year + irrigation) and data from the plantation to year 6 were recorded. In both experiments, vine vigour and yield were significantly affected by rootstocks and fertilisation/irrigation treatments. No interaction was recorded. The devigorating effect of RGM in comparison to SO4 was observed in both experiments, regardless of other parameters. Cabernet-Sauvignon was more affected by rootstock than Merlot.Conclusion: Rootstock effects on vine vegetative and reproductive development were consistently expressed, indicating that scion-rootstock interactions are governed not only by adaptative, but also by specific physiological traits.Significance and impact of study: This work provides information on scion-rootstock interactions which may be useful in rootstock breeding programs and may help to better choose the rootstock according to the scion and the environment.

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Long-term effects of controlled release urea application on crop yields and soil fertility under rice-oilseed rape rotation system

Field Crops Research ◽

10.1016/j.fcr.2015.09.003 ◽

2015 ◽

Vol 184 ◽

pp. 65-73 ◽

Cited By ~ 66

Author(s):

Jibiao Geng ◽

Yunbao Sun ◽

Min Zhang ◽

Chengliang Li ◽

Yuechao Yang ◽

...

Keyword(s):

Controlled Release ◽

Soil Fertility ◽

Oilseed Rape ◽

Crop Yields ◽

Long Term Effects ◽

Rotation System ◽

Controlled Release Urea

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Long-term effect of fertilization on soil fertility

Agrokémia és Talajtan ◽

10.1556/agrokem.63.2014.1.12 ◽

2014 ◽

Vol 63 (1) ◽

pp. 109-118

Author(s):

Imre Kádár

Keyword(s):

Soil Fertility ◽

Nutrient Balance ◽

Balance Sheet ◽

Life Time ◽

Mineral Fertilizers ◽

Long Term Effects ◽

After Effect ◽

Major Nutrients ◽

Unfertilized Plot

The surplus of the NPK balances of Hungarian agriculture, appearing in the nutrient balance sheet is a consequence of intensive fertilization in the past. Hungary had a positive P-balance between 1960 and 1990 for 30 years, and a positive NK-balance between 1970 and 1990 for 20 years during the 20th century.Studying the long-term effects of superphosphate in a field experiment on calcareous chernozem soil, it was found that the “half life time” of residual P was 5–7 years. The trial, i.e. the P after-effect lasted for 20 years.Liming and fertilization are the main soil fertility improving considerations for acidic sandy soils. These soils are often poor in all major nutrients. Mineral fertilizers, mainly NH4NO3, acidify soil, the pH values sink in comparison to the unfertilized plot. Liming and use of dolomite powder may counterbalance the acidification.

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