scholarly journals EFFECT OF REPLACING MINERAL NITROGEN BY ORGANIC MANURES UNDER DIFFERENT IRRIGATION REGIMES ON: A. VEGETATIVE GROWTH AND NUTRITIONAL STATUS OF “ANNA” APPLE TREES

2016 ◽  
Vol 7 (2) ◽  
pp. 203-216
Author(s):  
G. Mikhael ◽  
Manal Aziz
Keyword(s):  
Nutritional Status ◽  
Vegetative Growth ◽  
Mineral Nitrogen ◽  
Apple Trees ◽  
Organic Manures ◽  
Irrigation Regimes

scholarly journals Microelements content in leaves of raspberry cv. Willamette as affected by foliar nutrition and substrates

2012 ◽  
Vol 39 (No. 2) ◽  
pp. 67-73 ◽  
Author(s):  
Ž. Karaklajić-Stajić ◽  
I.S. Glišić ◽  
Dj. Ružić ◽  
T. Vujović ◽  
M. Pešaković
Keyword(s):  
Nutritional Status ◽  
Environmental Conditions ◽  
Iron Content ◽  
Vegetative Growth ◽  
Rubus Idaeus ◽  
Foliar Nutrition ◽  
Planting Material

Raspberry (Rubus idaeus L.) cultivar Willamette has long been the most commonly grown raspberry cultivar in Serbia, which is owing to high adaptability of the cultivar to respective agro-environmental conditions. Massive dieback of full bearing plantings is a major problem in raspberry growing hence quality planting material is a must when establishing new raspberry plantings. The study was conducted under protected conditions (in screenhouse) on plants obtained by micropropagation in vitro. In order to achieve optimal vegetative potential, plants were grown for two consecutive years (2004–2005) on two substrates (Steckmedium and Seedling) using three foliar fertilizers (Wuxal, Murtonik and Ferticare). The study revealed optimal vegetative growth in plants studied, excess manganese (150.60-214.52 mg/g), optimum iron content (94.00-123.50 mg/g), and zinc (28.60-31.00 mg/g) and copper (3.10-4.00 mg/g) deficiencies, based on the referent values of microelements content. The assessment of nutritional status of plants by the DOP index suggested significant differences in microelements imbalance when different foliar fertilizers and substrates are applied.

scholarly journals Potential of Hyperspectral and Thermal Proximal Sensing for Estimating Growth Performance and Yield of Soybean Exposed to Different Drip Irrigation Regimes Under Arid Conditions

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6569 ◽  
Author(s):  
Adel H. Elmetwalli ◽  
Salah El-Hendawy ◽  
Nasser Al-Suhaibani ◽  
Majed Alotaibi ◽  
Muhammad Usman Tahir ◽  
...  
Keyword(s):  
Vegetative Growth ◽  
Growth Stage ◽  
Plant Traits ◽  
Growth Traits ◽  
Water Status ◽  
Accurate Estimation ◽  
Growth Stages ◽  
Irrigation Level ◽  
Arid Conditions ◽  
Irrigation Regimes

Proximal hyperspectral sensing tools could complement and perhaps replace destructive traditional methods for accurate estimation and monitoring of various morpho-physiological plant indicators. In this study, we assessed the potential of thermal imaging (TI) criteria and spectral reflectance indices (SRIs) to monitor different vegetative growth traits (biomass fresh weight, biomass dry weight, and canopy water mass) and seed yield (SY) of soybean exposed to 100%, 75%, and 50% of estimated crop evapotranspiration (ETc). These different plant traits were evaluated and related to TI criteria and SRIs at the beginning bloom (R1) and full seed (R6) growth stages. Results showed that all plant traits, TI criteria, and SRIs presented significant variations (p < 0.05) among irrigation regimes at both growth stages. The performance of TI criteria and SRIs for assessment of vegetative growth traits and SY fluctuated when relationships were analyzed for each irrigation regime or growth stage separately or when the data of both conditions were combined together. TI criteria and SRIs exhibited a moderate to strong relationship with vegetative growth traits when data from different irrigation regimes were pooled together at each growth stage or vice versa. The R6 and R1 growth stages are suitable for assessing SY under full (100% ETc) and severe (50% ETc) irrigation regimes, respectively, using SRIs. The overall results indicate that the usefulness of the TI and SRIs for assessment of growth, yield, and water status of soybean under arid conditions is limited to the growth stage, the irrigation level, and the combination between them.

Effects of Variable Rate Nitrogen Application on cv. Barbera Performance: Vegetative Growth and Leaf Nutritional Status

2018 ◽  
Vol 69 (3) ◽  
pp. 196-209 ◽  
Author(s):  
Matteo Gatti ◽  
Cecilia Squeri ◽  
Alessandra Garavani ◽  
Alberto Vercesi ◽  
Paolo Dosso ◽  
...  
Keyword(s):  
Nutritional Status ◽  
Vegetative Growth ◽  
Variable Rate ◽  
Nitrogen Application ◽  
Cv Barbera

scholarly journals Post-bloom and preharvest treatment of ‘Braeburn’ apple trees with prohexadione-calcium and GA4+7 affects vegetative growth and postharvest incidence of calcium-related physiological disorders and decay in the fruit

2020 ◽  
Vol 261 ◽  
pp. 108919 ◽  
Author(s):  
Cassandro V.T. do Amarante ◽  
João Paulo G. Silveira ◽  
Cristiano A. Steffens ◽  
Sergio T. de Freitas ◽  
Elizabeth J. Mitcham ◽  
...  
Keyword(s):  
Vegetative Growth ◽  
Apple Trees ◽  
Physiological Disorders ◽  
Prohexadione Calcium

scholarly journals Cattle Horn Shavings: A Possible Nitrogen Source for Apple Trees

Agronomy ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 540
Author(s):  
Juozas Lanauskas ◽  
Nobertas Uselis ◽  
Loreta Buskienė ◽  
Romas Mažeika ◽  
Gediminas Staugaitis ◽  
...  
Keyword(s):  
Ammonium Nitrate ◽  
Nitrogen Content ◽  
Nitrogen Nutrition ◽  
Agricultural Waste ◽  
Leaf Nitrogen ◽  
Mineral Nitrogen ◽  
Research Centre ◽  
Leaf Nitrogen Content ◽  
Apple Trees ◽  
Orchard Soil

The circular economy concept promotes the recycling of agricultural waste. This study was aimed at investigating the effects of cattle horn shavings on apple tree nitrogen nutrition. Ligol apple trees on P 60 rootstock were the object of the study. The experiment was conducted in the experimental orchard of the Institute of Horticulture, Lithuanian Research Centre for Agriculture and Forestry, from 2015 to 2018. Two fertiliser rates were tested: 50 and 100 kg/ha N. Horn shavings (14.1% N) were applied at the end of autumn or at the beginning of vegetation in the spring and in one treatment 100 kg/ha N rate was divided into two equal parts and applied both in autumn and spring. The effects of the horn shavings were compared with the effects of ammonium nitrate (34.4% N) and the unfertilised treatment. The lowest mineral nitrogen content was found in the unfertilised orchard soil and the soil fertilised with horn shavings in the spring at 50 kg/ha N equivalent. In all other cases, the fertilisers increased the soil’s mineral nitrogen content. The lowest leaf nitrogen content was found in apple trees that grew in the unfertilised orchard soil or soil fertilised in the spring with 50 kg/ha N of horn shavings (1.58–2.13%). In other cases, leaf nitrogen content was higher (1.77–2.17%). The apple trees with the lowest leaf nitrogen content produced the smallest average yield (34.5–36.6 t/ha). The highest yield was recorded from fruit trees fertilised with 50 kg/ha N of ammonium nitrate applied in spring or horn shavings applied in autumn (42.4 and 41.4 t/ha, respectively). The influence of horn shavings on the other studied parameters was similar to that of ammonium nitrate. Horn shavings, like nitrogen fertiliser, could facilitate nitrogen nutrition management in apple trees, especially in organic orchards, where the use of synthetic fertilisers is prohibited.

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