Influence of Foliar Application of Nitrogen on Tree Growth, Precocity, Fruit Quality, and Leaf Mineral Nutrients in Young ‘Fuji’ Apple Trees on Three Rootstocks

Abstract

The influence of three foliar applications and one ground application of nitrogen on tree growth, precocity, fruit quality at harvest and after storage, and leaf mineral concentrations in young 'Fuji' apple (Malus domestica Borkh.) trees on three rootstocks were studied. Trees that received a total of 197 g urea (90.6 g actual N) as a ground application over three growing seasons had greater trunk cross-sectional area (TCA), yield per tree, and yield efficiency than trees which received one of three rates of foliar applications. Trees receiving ground-applied or foliarly-applied urea at the highest rate had the heaviest fruit. Fruit firmness was greatest in the lowest foliar treatment. Ground application resulted in greater than average leaf N in

Effect of foliar and soil application of urea on leaf nutrients concentrations, yield and fruit quality of pomegranate

“…Therefore, results of present study suggest that the influence of foliar application of urea is much lower efficient than soil application and it should be used as a supplementary nutrition for the trees. Similar result was also reported that soil application of urea has been more efficient in increasing the yield and fruit size than foliar application in apple (Fallahi et al, 1997).…”

“…In present experiment, increase in the fruit number/tree was associated with an increase in fruit size and increase in these parameters had lead to enhance fruit yield. Fallahi et al (1997) stated that levels of leaf N had positive effect on fruit size in apple, so that heavier fruits obtained from trees that had higher levels of N in leaves. In addition, with the increase in nitrogen supply in apple, average fruit size increased (Xia et al, 2009).…”

I. Mineral nutrient profiles and relationships of ‘Honeycrisp’ grown on a genetically diverse set of rootstocks under Western New York climatic conditions

“…Rootstocks G.41N, B.10 and G.11 displayed the highest levels, whereas G.214 conferred low values on 'Honeycrisp'. Nitrogen is essential for vegetative growth and is a nutrient that needs to be present in a balanced way where too little will inhibit growth, fruit set and too much will induce problems with fruit quality, excessive vegetative growth and diseases (Fallahi et al, 1997a;Fallahi and Mohan, 2000;Raese and Drake, 1997). Knowing the nitrogen uptake potential of rootstocks will allow for more precise application and utilization when combined with modern recommendations that include methods, timing and amounts (Neilsen and Neilsen, 2002).…”

Foliar and soil N fertilization as a function of cropping behaviour of Royal Delicious apple (Malus domestica)

“…Foliar spraying of Urea has been recommended because of greater efficiency of uptake and there is no risk of groundwater contamination (Weinbaum 1988, Cambardella 2002. Considerable amount of total N was lost through leaching of soil applied N, compared with foliar N applications (Fallahi et al 1997).…”

“…Others have found that the effect of foliar sprays are largely confined to the sprayed leaves and do not affect fruiting or N status of the entire tree (Forshey 1963). The distribution of Urea derived N in fruits, leaves, shoots, and branches of 'Golden Delicious' apple tree was strongly influenced by the amount of Urea application and its method (soil or foliar) of applications (Fallahi et al 1997). Allen (1970) and Han et al (1989) found that up to 80 per cent of N spray could be absorbed by the leaves, while Ford (1968) showed that N sprays could increase leaf concentration less than 50 per cent.…”