Effects of soil phosphorus on pollen production, pollen size, pollen phosphorus content, and the ability to sire seeds in Cucurbita pepo (Cucurbitaceae)

1994 ◽  
Vol 7 (4) ◽  
Author(s):  
Tak-Cheung Lau ◽  
AndrewG. Stephenson
Keyword(s):  
Cucurbita Pepo ◽  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Pollen Size ◽  
Pollen Production

Phosphorus Leaching in Relation to Soil Type and Soil Phosphorus Content

2004 ◽  
Vol 33 (2) ◽  
pp. 678 ◽  
Author(s):  
Faruk Djodjic ◽  
Katarina Börling ◽  
Lars Bergström
Keyword(s):  
Soil Type ◽  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Phosphorus Leaching

scholarly journals Nectar and pollen production in pumpkin (Cucurbita pepo L.)

2006 ◽  
Vol 29 (2) ◽  
Author(s):  
Maria das Graças Vidal ◽  
David de Jong ◽  
Hans Chris Wien ◽  
Roger A. Morse
Keyword(s):  
Cucurbita Pepo ◽  
Pollen Production

scholarly journals Changes in the Content of Soil Phosphorus after its Application into Chernozem and Haplic Luvisol and the Effect on Yields of Barley Biomass

2016 ◽  
Vol 64 (5) ◽  
pp. 1603-1608 ◽  
Author(s):  
Tomáš Lošák ◽  
Jaroslav Hlušek ◽  
Ivana Lampartová ◽  
Jakub Elbl ◽  
Gabriela Mühlbachová ◽  
...  
Keyword(s):  
Aboveground Biomass ◽  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Acid Soil ◽  
Spring Barley ◽  
Control Treatment ◽  
Soil Reaction ◽  
Soil P ◽  
Low Phosphorus ◽  
P Rate

The pot experiment was established in vegetation hall in the year 2015. Spring barley, variety KWS Irina, was grown. Two different soils – chernozem from Brno (with a low phosphorus content and alkali soil reaction – 7.37) and haplic luvisol from Jaroměřice nad Rokytnou (with a high phosphorus content and slightly acid soil reaction – 6.01) were used for comparison. The rates of phosphorus in the form of triple superphosphate (45 % P2O5) were increased from 0.3 – 0.6 – 1.2 g per pot (5 kg of soil – Mitscherlich pots). Nitrogen was applied in the form of CAN (27 % N) at a rate of 1 g N per pot in all the treatments incl. the control. Using statistical analysis, significant differences were found between the two soil types both in terms of the postharvest soil P content and yields of aboveground biomass. The content of post‑harvest soil phosphorus increased significantly with the applied rate (96 – 141 – 210 mg/kg in chernozem and 128 – 179 – 277 mg/kg in haplic luvisol). Dry matter yields of the aboveground biomass grown on chernozem were the lowest in the control treatment not fertilised with P (38.97 g per pot) and increased significantly with the P rate applied (46.02 – 47.28 g per pot), although there were no significant differences among the fertilised treatments. On haplic luvisol phosphorus fertilisation was not seen at all, demonstrating that the weight of the biomass in all the treatments was balanced (48.12 – 49.63 g per pot).

THE INFLUENCE OF VARIETY, SOIL TEMPERATURE, AND PHOSPHORUS FERTILIZER ON YIELD AND PHOSPHORUS UPTAKE BY ALFALFA

1963 ◽  
Vol 43 (3) ◽  
pp. 355-360 ◽  
Author(s):  
M. Levesque ◽  
J. W. Ketcheson
Keyword(s):  
Soil Temperature ◽  
Dry Matter ◽  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Phosphorus Uptake ◽  
Growth Period ◽  
Yield Potential ◽  
Phosphorus Fertilization ◽  
Maximum Value ◽  
Phosphorus Application

Du Puits and Ladak varieties of alfalfa were grown for 10 weeks in the greenhouse on soil-sand media controlled at temperatures of 10°, 18°, and 26 °C. P32-tagged superphosphate was applied at rates of 10 and 80 p.p.m. phosphorus, respectively. Dry matter yields and phosphorus content of the tissue was determined at the end of the growth period. Increasing soil temperature from 10° to 26 °C. caused corresponding increases in total phosphorus uptake as a result of an increase in dry matter yields as well as an increase in the percentage of phosphorus in the plant tissue. Ladak exhibited the higher yield potential although Du Puits was less affected by low soil temperature conditions and appeared capable of making better use of soil phosphorus. With the higher phosphorus application, the root-top ratio for Du Puits was greater than that for Ladak, and the maximum value for this ratio occurred at 18 °C. for each variety. P32 activity measured in the tissue indicated that soil temperature was critical in terms of phosphorus fertilization in the 4- and 6-week stages of growth.

Phosphorus Leaching in Relation to Soil Type and Soil Phosphorus Content

2004 ◽  
Vol 33 (2) ◽  
pp. 678-684 ◽  
Author(s):  
Faruk Djodjic ◽  
Katarina Börling ◽  
Lars Bergström
Keyword(s):  
Soil Type ◽  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Phosphorus Leaching

scholarly journals Incorporating Environmentally Compliant Manure Nutrient Disposal Costs into Least-Cost Livestock Ration Formulation

2008 ◽  
Vol 40 (01) ◽  
pp. 287-300 ◽  
Author(s):  
Joleen C. Hadrich ◽  
Christopher A. Wolf ◽  
J. Roy Black ◽  
Stephen B. Harsh
Keyword(s):  
Crop Rotation ◽  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Dairy Farm ◽  
Herd Size ◽  
Nutritional Requirements ◽  
Substantial Cost ◽  
Feed Cost ◽  
Initial Soil ◽  
Target Performance

Livestock rations are formulated to minimize feed cost subject to nutritional requirements for a target performance level, which ignores the potentially substantial cost of disposing of nutrients fed in excess of nutritional requirements. We incorporate nutrient disposal costs into a modified least-cost ration formulation model to arrive at a joint least-cost decision that minimizes the sum of feed and net nutrient disposal costs. The method is demonstrated with phosphorus disposal costs on a representative dairy farm. Herd size, land availability and proximity, crop rotation, and initial soil phosphorus content are shown to be important in determining phosphorus disposal costs.

scholarly journals Soil Phosphorus and Corn Development Under Application of Phosphate Sources

2021 ◽  
Vol 13 (9) ◽  
pp. 61
Author(s):  
Paulo Fernandes Boldrin ◽  
Ana Carollina Pereira dos Reis ◽  
Vinícius de Mello Benites ◽  
Rose Luiza Moraes Tavares ◽  
June Faria Scherrer Menezes ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Laboratory Evaluation ◽  
Triple Superphosphate ◽  
Initial Development ◽  
Soil P ◽  
History Of ◽  
Corn Plants ◽  
P Sources

Knowledge of the solubility of phosphate fertilizers is fundamental for phosphorus (P) recommendation management and for choosing the laboratory evaluation method of nutrient availability in the soil according to the history of fertilization. The aim was to evaluate the initial development of corn plants as a function of the application of triple superphosphate (TSP) and natural phosphate of Arraias (NPA) with and without liming and incubation time, as well as to evaluate the available P in the soil with the use the extractors Mehlich-1 and Mehlich-3. An experiment was installed in an 8 × 3 × 2 factorial scheme, being 8 fertilizer incubation times (180, 140, 100, 80, 60, 40, 20, 0 day(s) before planting), 3 P sources (control—without P, TSP and NPA) and 2 refers to the application of limestone (with and without limestone). Were evaluated the shoot and root dry matter, analysis of P, Ca, Mg, and Zn in shoot and P in roots. In the soil, P levels were determined by Mehlich-1 and Mehlich-3 extractors. There was a greater accumulation of P with the application of TSP with limestone in all incubation times. The application of the NPA allowed a greater accumulation of P in the plants without the application of lime. The previous incubation of the NPA did not favor the efficiency of this source, neither in the soil with corrected acidity nor in the soil with its original acidity. Mehlich-3 proved to be adequate to determine the phosphorus content in soil fertilized by NPA.

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