The effects of placing small amounts of phosphate fertilizer close to the seed on growth and nutrient concentrations of lettuce

Costigan, P. A.

doi:10.1007/bf02182341

Cited by 20 publications

(15 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…applying a small amount of uniformly mixed fertilizer and placed fertilizer which also contains inorganic P, is widely used in crop production to ensure good seedling establishment and, ultimately, crop yield (Costigan 1984;Cahill et al 2008). These P fertilizers are able to not only increase soil available P but also subsequently decrease the ratio of C:P in the rhizosphere.…”

Section: Discussionmentioning

confidence: 99%

“…Starter P fertilizer technology, applying a small amount of inorganic P fertilizer near the seed, is widely used in crop production to ensure good seedling establishment and, ultimately, crop yield (Costigan 1984;Cahill et al 2008). The applied P fertilizers increase soil available P for plants (Attar et al 2012;Djodjic & Mattsson 2013) and subsequently decrease the C:P ratio in the rhizosphere.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reducing carbon: phosphorus ratio can enhance microbial phytin mineralization and lessen competition with maize for phosphorus

Lin

Ding

Chen

et al. 2014

Journal of Plant Interactions

View full text Add to dashboard Cite

We tested the hypothesis that reducing the carbon (C):Phosphorus (P) ratio in rhizosphere soil would reduce bacterial competition with the plant for P from phytin, which would then increase phytin use efficiency for the plant. A threefactor pot experiment was carried out to study the effect of inoculation with a phytin-mineralizing bacterium, Pseudomonas alcaligenes (PA), on maize P uptake from phytin. Two levels of organic P, two levels of inorganic P, and three different PA inoculation treatments were used. When maize plants were grown in low available P soil with phytin, PA transformed soil P into microbial biomass P, which caused competition for available P with plant and inhibited plant uptake. When 5 mg P kg −1 as KH 2 PO 4 was added, inoculation with PA increased soil acid phosphatase activity which enhanced the mineralization rate of phytin. PA mobilized more P than it immobilized in microbial pool and enhanced plant P uptake. We conclude that the decreased C:P ratio by adding small amount of inorganic P in the rhizosphere could drive phytin mineralization by the bacteria and improve plant P nutrition.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reducing carbon: phosphorus ratio can enhance microbial phytin mineralization and lessen competition with maize for phosphorus

Lin

Ding

Chen

et al. 2014

Journal of Plant Interactions

View full text Add to dashboard Cite

show abstract

“…Some data displaying this effect (from Costigan, 1984) are plotted in Figure 5 together with an estimate of the expected response to broadcast fertilizer derived from the model. The agreement was very good.…”

Section: Predictions From the Modelmentioning

confidence: 99%

“…Previous work has shown that although lettuce might not respond to broadcast fertilizer on a fertile soil, the plants may still show a marked response to placed fertilizer (Costigan, 1984). This phenomenon should be explicable in terms of published information on plant nutrient demands, rates of root growth and nutrient distribution in the soil.…”

Section: Introductionmentioning

confidence: 96%

A model to describe the pattern of availability of broadcast phosphorus fertilizer during the growth of a crop

Costigan¹

1987

Plant Soil

Self Cite

View full text Add to dashboard Cite

A model is described which compares the rate of phosphorus demand of a field grown lettuce crop with the rate at which the crop can obtain phosphorus from broadcast fertilizer. Early root growth of lettuce is so slow that on average it takes about 21 days for the first granule of fertilizer to be exploited by a plant, whereas seed reserves of phosphorus are depleted within about 8 days of sowing. This is likely to result in a reduction in yield which cannot be overcome by simply applying more broadcast fertilizer. Some placement of fertilizer near to each plant is required if phosphorus deficiency is to be avoided. The model can also be applied to other crops, and the delay before the first fertilizer granule is exploited is shown to be slightly shorter in cabbage and very short in wheat.

show abstract

“…A logical question is how narrow such a band can be without restricting yields. Costigan (1984) has shown with lettuce grown in pots that placing a small quantity of P close to the seed increased the dry matter yield compared with incorporating 60x as much P throughout the soil. He similarly emphasised plant nutrient status during early stages of growth as an important determinant of yield.…”

Section: Discussionmentioning

confidence: 99%

Hybrid squash: Yield responses to potassium and phosphorus fertilisers at four sites of varying initial fertility

Buwalda

1986

New Zealand Journal of Experimental Agriculture

View full text Add to dashboard Cite

Hybrid squash (Cucurbita maxima L. cv. Delica) was grown at five levels of potassium (K) and five levels of phosphorus (P), at four sites differing in initial fertility at Pukekohe, New Zealand. K and P concentrations in soil and leaf samples taken at three stages of crop growth were measured. Total and exportable fruit yields were measured when the crop was mature. Exchangeable K and NaHCOJ-soluble P levels in the soil increased approximately linearly with increasing inputs of K and P fertilisers respectively at each site. The effects of fertiliser treatments on tissue K and P concentrations were more pronounced in randomly sampled leaves than in young mature leaves and declined during crop growth. At harvest, the yield responses to P fertiliser increased from 14% to 82% with decreasing initial soil P fertility. The effects of the fertiliser treatments resulted primarily from effects on fruit number per plant. For K, relative yields (the yield for each treatment expressed as a proportion of the yield with nonlimiting soil fertility at each site) were related to soil exchangeable K or leaf K concentrations 14 days after crop emergence. Similarly for P, relative yields were related to NaHCOJ-soluble P or leaf P concentrations 14 days after crop emergence. These relationships suggest that 90% of maximum yield for hybrid squash requires exchangeable K in the soil of 350 mg/kg and a leaf K concentration of 54 g/kg, NaHCOJ-soluble P in the soil of 120 mg/kg and a leaf P concentration of 7 g/kg for crops on Patumahoe clay loam 14 days after emergence. Some implications of these results for fertiliser management for hybrid squash are discussed.

show abstract

The effects of placing small amounts of phosphate fertilizer close to the seed on growth and nutrient concentrations of lettuce

Cited by 20 publications

References 10 publications

Reducing carbon: phosphorus ratio can enhance microbial phytin mineralization and lessen competition with maize for phosphorus

Reducing carbon: phosphorus ratio can enhance microbial phytin mineralization and lessen competition with maize for phosphorus

A model to describe the pattern of availability of broadcast phosphorus fertilizer during the growth of a crop

Hybrid squash: Yield responses to potassium and phosphorus fertilisers at four sites of varying initial fertility

Contact Info

Product

Resources

About