Top and root growth and nutrient absorption of Prunus avium L. at two soil pH and P levels

Abstract

One-year-old Prunus avium L. were grown under greenhouse conditions in a Countesswells soil in all combinations of 2 pH and 2 P levels. The soil, obtained from a long-term liming and fertilizer experiment, provided pH values throughout the experiment of 3.75-3.99 (pH 1) and 4.81-5.41 (pH 2). The P treatments had 0.43% acetic acid extractable P of 31-44 #g g-~ (P1) and 145-173/~g g-~ (P2). The trees were harvested 92 (HI), 134 (H2), and 168 (H3) days after initiation of growth.Top (leaf + new stem) dry weight was significantly increased for pH 2 and P2 at H2 and H3. P2 also increased leaf weight (H 1), the weight of the original stem-root (H2 and H3), and root length but decreased root diameter at both soil pHs (H2 and H3). Total tree uptake of N, P, K, Ca, and Mg was also increased by pH-P combinations which had significantly greater dry matter production and root length. Total Mn uptake decreased at pH2. Root nutrient inflows (uM m-~ day-~ ) were increased for Ca at pH2 and for P at P2. Mn inflow decreased at pH2 and at pHI P2 although the increased root length associated with the latter treatment resulted in increased total tree Mn uptake. In general, high nutrient inflows occurred in all trees at H1 and in severely stunted trees at pill P1; both had larger than average root diameters.

Liming effects on growth of native woody species from Brazilian Savannah

“…That agrees with results of Nielsen et al (1990) who found that plants of Prunus avium L. presented higher acquisition of nutrients when growing in limed soil. However, in the present study, the increases in the TNC, mainly because of the Ca and Mg added via soil liming (Table 4), were not always followed by proportional responses in the TDM (Table 3).…”

Soil Disinfection and Monoammonium Phosphate Fertilization Increase Precocity of Apples on Replant Problem Soils

“…Although there were no field tests using biocides alone, pot testing in British Columbia suggested such treatments were not as effective as when used in combination with MAP (Slykhuis and Li, 1985). The use of planting-hole P fertilization in combination with some form of soil disinfection seems to be a desirable strategy since high P availability is known to increase the initial root length and improve the establishment of some woody perennials (Neilsen et al, 1990b). Also, a perceived disadvantage of destruction of potentially beneficial mycorrhizal fungus associations by fumigation (Lambert et al, 1979) may be lessened by the addition of P, the acquisition of which is known to be a major nutritional advantage of mycorrhizal infection of fruit trees.…”

Flowering of Apple Trees in the Second Year Is Increased by Firstyear P Fertilization

“…are related (Menary and van Staden, 1976). Increased initial root length is a known consequence of high P supply to wild cherry (Prunus avium L.) (Neilsen et al, 1990). A similar increase in root growth in apple could be associated with increased cytokinin levels contributing to the enhancement of flower initiation.…”