The activity of dung beetles increases foliar nutrient concentration in tropical seedlings

Biotropica ◽  
2016 ◽  
Vol 48 (5) ◽  
pp. 565-567 ◽  
Author(s):  
Carolina Santos-Heredia ◽  
Ellen Andresen ◽  
Ek del-Val ◽  
Diego A. Zárate ◽  
Maribel Nava Mendoza ◽  
...  
Keyword(s):  
Nutrient Concentration ◽  
Dung Beetles ◽  
Foliar Nutrient Concentration ◽  
Foliar Nutrient

Growth and foliar nutrient concentration response of Clerodendrum thomsoniae to increasing fertilization

2012 ◽  
Vol 14 (01) ◽  
pp. 29-32
Author(s):  
Karen I Davis ◽  
Carl E. Niedziela Jr. ◽  
Brian E. Whipker ◽  
Muchha R. Reddy
Keyword(s):  
Nutrient Concentration ◽  
Foliar Nutrient Concentration ◽  
Foliar Nutrient

Evaluating the nutrient status and fertilization response potential of planted spruce in the interior of British Columbia

1994 ◽  
Vol 24 (3) ◽  
pp. 594-602 ◽  
Author(s):  
K.I. Swift ◽  
R.P. Brockley
Keyword(s):  
British Columbia ◽  
Nutrient Concentration ◽  
Nutrient Status ◽  
N Fertilization ◽  
First Year ◽  
Concentration Data ◽  
Foliar Nutrient Concentration ◽  
Foliar Nutrient ◽  
Complete Fertilizer ◽  
Relative Differences

Factorial combinations of nitrogen (0, 100, and 200 kg/ha) and a "complete" fertilizer (0 and 1170 kg/ha) were applied to 10 spruce (Piceaglauca (Moench) Voss and hybrids) plantations in the central interior of British Columbia. Postfertilization patterns of foliar nutrient concentration and needle weight were used to evaluate the nutrient status and fertilization response potential of treated stands. When applied alone, N and the complete fertilizer generally had little effect on the weight of needles produced in the first year after treatment. Combined applications, however, often resulted in large responses. In 8 of the 10 installations, combined applications of N + complete fertilizer were significantly more effective than N alone in stimulating first-year needle weight. Which nutrient in the complete fertilizer is responsible for the increased needle-weight response cannot be stated conclusively. However, examination of foliar nutrient concentration data, combined with graphical analyses of relative differences in needle weight and nutrient concentration of added and nonadded nutrients, indicate that sulphur (and possibly potassium) may have a strong controlling influence on the N fertilization response potential of these stands. Systematic testing must be undertaken to verify these tentative diagnoses.

scholarly journals Yield, quality and foliar nutrient concentration of 'Orlando' tángelo under different fertilizer regimes

1969 ◽  
Vol 85 (1-2) ◽  
pp. 41-47
Author(s):  
Agenol González-Vélez ◽  
Gerardo Ruiz-Sifre
Keyword(s):  
Nutrient Concentration ◽  
Fruit Weight ◽  
Foliar Nutrient Concentration ◽  
Foliar Nutrient ◽  
Cumulative Production ◽  
Foliar Concentrations ◽  
Yield Quality ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus ◽  
Different Levels

An experiment was done to evaluate the effect of different levels of nitrogen, phosphorus and potassium fertilization on the yield, quality and foliar nutrient concentration of 'Orlando' tángelo in a Corozaf clay soil. Nitrogen levels evaluated were 0,85.2,170 and 341 kg/ha. Levels of phosphorus evaluated were 0,12.4, 24.8 and 49.6 kg/ha; and potassium levels were 0, 47.8, 94.6 and 188 kg/ha. A significant linear response was found between the nitrogen application and the cumulative production of fruits per tree. High application of nitrogen was related to high cumulative production. No significant relationship was found between the phosphorus and potassium levels and the cumulative production. The application of different levels of nitrogen, phosphorus, and potassium had no effect on the average fruit weight and the quality of fruits in terms of pH, brix, acidity and brix/acidity rate. The different levels of nitrogen significantly affected the foliar nutrient concentration of nitrogen, calcium, potassium and phosphorus. Different applications of phosphorus significantly affected the foliar concentrations of calcium and potassium. The levels of potassium had no significant effect on the foliar concentrations of the different elements evaluated.

Foliar Nutrient Concentration Differences Between Provenances of Douglas Fir and Their Significance to Foliar Analysis Interpretation

1973 ◽  
Vol 3 (2) ◽  
pp. 323-328 ◽  
Author(s):  
R. van den Driessche
Keyword(s):  
Nutrient Concentration ◽  
Coastal Region ◽  
Douglas Fir ◽  
Shoot Length ◽  
Nutrient Concentrations ◽  
Foliar Nutrient Concentration ◽  
Foliar N ◽  
Foliar Nutrient ◽  
Foliar Nutrient Concentrations ◽  
The Relationship

Foliar nutrient concentration differences between provenances, and the relationship between foliar nutrient levels and provenance growth was examined in Douglas fir (Pseudotsugamenziesii (Mirb.) Franco) from the coastal region of British Columbia.In the first experiment differences in foliar nutrient concentrations among four provenances of 3-year old plants, ranged from 8 to 18%. The relationships between these provenances differed according to whether needle, or whole plant nutrient concentrations were considered.In the second experiment 2-year old plants of three provenances, grown under four fertilizer regimes, at each of three nurseries, showed that differences in growth and foliar nutrient concentrations between provenances were affected by nursery. The degree of correlation between shoot length and foliage nutrient concentration varied according to provenance. Coefficients for the regression of shoot length on foliar N and K differed between provenances even when provenance foliar N and K levels were similar. It was suggested that the relationship between foliar nutrient concentrations and shoot length may differ between provenances.

Frost hardiness of Thujaplicata and Pseudotsugamenziesii seedlings when nutrient supply varies with season

1996 ◽  
Vol 26 (8) ◽  
pp. 1509-1513 ◽  
Author(s):  
B.J. Hawkins ◽  
G. Henry ◽  
J. Whittington
Keyword(s):  
Differential Scanning Calorimetry ◽  
Electrolyte Leakage ◽  
Nutrient Concentration ◽  
Douglas Fir ◽  
Control Treatment ◽  
Scanning Calorimetry ◽  
Western Redcedar ◽  
Nutrient Treatment ◽  
Foliar Nutrient Concentration ◽  
Foliar Nutrient

Seedlings of coastal Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) and western redcedar (Thujaplicata Donn ex D. Don) were subject to three nutrient treatments varying the rate of application of nitrogen (N) and phosphorus (P) over the growing season. A control treatment provided seedlings with a constant supply of N and P. A high–low treatment reduced the rate of N and P supply after mid-July. A low–high treatment initially supplied seedlings with low amounts of N and P, and then increased the rate of supply after mid-July. Foliar nutrient concentration of seedlings of each species from each nutrient treatment was measured in September and the following April. Cold tolerance of seedlings was assessed five times over the winter season by freeze-induced electrolyte leakage and twice by differential scanning calorimetry (DSC). Nutrient treatment did not significantly affect foliar nutrient concentration in either species. Height of Douglas-fir seedlings was also unaffected by nutrient treatment, but western redcedar seedlings in the control treatment were 6.3 cm taller than those in the high–low treatment. Interpolated damage at −13 °C from freeze-induced electrolyte leakage indicated that Douglas-fir seedlings from the control treatment had 19.8% less damage than high–low seedlings in October, 18% less damage in November, and 1.6% less damage in December. The same trend was evident, although not always significant, in western redcedar. Differential scanning calorimetry analyses of Douglas-fir in October and November showed freezing and melting curve onset and peak temperatures to be, on average, 2.3 °C and 0.4 °C warmer, respectively, in control seedlings than in high–low plants.

scholarly journals Effects of Soil pH on Four Field-Grown Nursery Crops

1985 ◽  
Vol 3 (3) ◽  
pp. 136-139
Author(s):  
C.D. Gilliam ◽  
J.T. Eason ◽  
C.E. Evans
Keyword(s):  
Soil Ph ◽  
Nutrient Concentration ◽  
Foliar Nutrient Concentration ◽  
Foliar Nutrient ◽  
Nursery Crops ◽  
Ph Level

Four woody nursery crops were grown for 3 years (1981–1983) in plots with varying pH levels. Greater growth of ‘Compacta’ Japanese holly and Foster's holly occurred in 1981 and 1982 at lower pH levels (4.1–5.8). However, Mn phytotoxic symptoms appeared on ‘Compacta’ Japanese holly dunng the fall of 1982. Foliar Mn levels of all 4 species exceeded 2500 ppm when grown at the lowest pH level, with the exception of Foster's holly in 1983. Growth of ‘Nellie R. Stevens’ holly was not affected by pH, while Taxus growth was enhanced in 1983 at the higher pH levels (4.7–5.9). Foliar nutrient concentration trends were similar among the 4 crops.

Sign in / Sign up

Export Citation Format

Share Document