Autumn urea application and cold hardiness of apple trees
نویسندگان
چکیده
منابع مشابه
Nitrogen absorption, translocation and distribution from urea applied in autumn to leaves of young potted apple (Malus domestica) trees.
We studied the absorption, assimilation, translocation and distribution of nitrogen (N) from urea applied in autumn to leaves of 1-year-old potted Fuji/M26 apple (Malus domestica Borkh) trees. In early October, all leaves of each tree were painted with either 3% urea (enriched to 10 atom % with 15N) or water (control trees). Four trees were harvested before the treatment and N and amino acid co...
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stresses caused by their freezing and thawing. A key difference between a hardy plant and a non-hardy plant is believed to be where the ice forms in freezing: inside the living cells or outside of them. If ice forms inside of cells, it is almost always fatal to them, and this is probably the principal cause of frost kill in non-hardy plants. Normally hardy tissue may be killed by moderate tempe...
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To explore the roles of plasticity and genetic variation in the response to spatial and temporal climate variation, we established a common garden consisting of paired collections of native and introduced riparian trees sampled along a latitudinal gradient. The garden in Fort Collins, Colorado (latitude 40.6°N), included 681 native plains cottonwood (Populus deltoides subsp. monilifera) and int...
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The main reasons for the fixation of some elements and consequently nutrient deficiencies, especially phosphorus, iron and zinc, are high levels of calcium (calcareous soils) and soil pH. Two sulfur fertilizers (sulfur alone and sulfur + organic material + Thiobacillus spp.) with two rates (2 and 4 kg sulfur/tree) were used to decrease soil pH and availability of P, Fe and Zn in apple trees dur...
متن کاملCold Hardiness Comparison of Young Trees of 'ambersweet' with 'valencia' Orange during Controlled Freezes
Two-year-old 'Ambersweet' ( Citrus reticulata Blanco X [ C poroc/f'siMacf. X C. reticulata]) X midseason orange, C. s/nensfs(L.) Osb. trees on three rootstocks, sour orange (C. aurantium L), Cleopatra mandarin (C. reticulate), and Carrizo citrange (C. sinensisX Poncirus trifoliate* (L) Raf.) grow ing in 15-liter pots were exposed to cold-hardening regimes in controlled-temperature rooms and fre...
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ژورنال
عنوان ژورنال: Acta Agrobotanica
سال: 2013
ISSN: 2300-357X
DOI: 10.5586/aa.2003.012