scholarly journals Nitrogen and potassium fertilization of potato

1978 ◽  
Vol 50 (2) ◽  
pp. 67-77
Author(s):  
Hilkka Tähtinen
Keyword(s):  
Nitrogen Fertilization ◽  
Starch Content ◽  
Fertilization Rate ◽  
Application Rate ◽  
Potassium Fertilization ◽  
Mineral Soils ◽  
One Year ◽  
Starch Yield ◽  
Nitrogen Application Rate

Fourteen one-year N- and K-fertilization experiments for potato were carried out on coarse mineral soils on different sites in Finland. The nitrogen fertilization (from 50 to 156 kg/ha N) was given in the form of ammonium nitrate limestone, and the potassium (42—179 kg/ha K) in potassium sulphate. The nitrogen fertilization affected significantly both the yield and the quality of the tubers. The maximum tuber yield was achieved at the nitrogen application rate of 110 kg/ha. The economically most advantageous fertilization rate was 80 kg of nitrogen per hectare, if only the amount of the yield was taken into account. The nitrogen fertilization weakened the quality of the tubers. The weight and the size of the tubers increased, but the starch content of the tubers decreased as a result of the nitrogen fertilization. The starch yield also turned out to be the smallest at the heaviest nitrogen fertilization. Further, the biggest rate of nitrogen weakened the flavor of the tubers, depressed their mealiness, and increased slightly their discoloration when raw. The fertilization had no effect on the darkening of cooked potatoes. In these one-year experiments, the increase of the potassium fertilization from 42 kg/ha K did not have a significant effect on the yield and the quality of the tubers.

Effect of Nitrogen Fertilization on Yield and Quality of Endive

2009 ◽  
Vol 70 (1) ◽  
pp. 193-201 ◽  
Author(s):  
Katarzyna Adamczewska-Sowińska ◽  
Cecylia Miłowana Uklańska
Keyword(s):  
Nitrogen Fertilization ◽  
Nutritional Value ◽  
Growth Yield ◽  
Dry Weight ◽  
Application Rate ◽  
Marketable Yield ◽  
Nitrate Accumulation ◽  
Yield And Quality ◽  
Nitrogen Application Rate

Effect of Nitrogen Fertilization on Yield and Quality of EndiveThe aim of the experiments carried out in 2007-2008 was to assess the effect of various nitrogen doses on the growth, yield and nutritional value of two endive cultivars Cigal and Excel. The effects of two types of fertilizers were compared: that of ammonium nitrate with that of the product Entec-26. On the basis of the results obtained, it was shown that endive cv. Excel produced a marketable yield that was on average by 35.5% higher than that of the cultivar Cigal. A significantly higher marketable yield of endive was obtained by fertilizing with a single dose of the fertilizer Entec-26, particularly at the rates of 90 and 135 kg N·ha-1, and also 180 kg N·ha-1. The experiments also revealed a significant effect of the fertilization method and nitrogen application rate on the biological value of the endive cultivars under evaluation. The cultivar Excel was characterized by a higher degree of nitrate accumulation, whereas the cultivar Cigal had a higher vitamin C content, dry weight, and chlorophyll content.

scholarly journals Nitrogen fertilizer application rate impacts eating and cooking quality of rice after storage

PLoS ONE ◽  
2021 ◽  
Vol 16 (6) ◽  
pp. e0253189
Author(s):  
Hanling Liang ◽  
Dongbing Tao ◽  
Qi Zhang ◽  
Shuang Zhang ◽  
Jiayi Wang ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Cooking Quality ◽  
Fertilizer Application ◽  
Application Rate ◽  
Fertilizer Application Rate ◽  
Eating And Cooking Quality ◽  
One Year ◽  
The Stability ◽  
Nitrogen Application Rate

The effect of nitrogen fertilizer application on the quality of rice post-storage is not well understood. The eating and cooking quality (ECQ) of rice treated with 0 (CK, control), 160 (IN, insufficient nitrogen), 260 (AN, adequate nitrogen), and 420 (EN, excessive nitrogen) kg N/ha was analyzed over 12 months of storage. Results showed that the rate of nitrogen fertilizer application had no significant impact on the changes in taste value during storage. However, EN application significantly increased the hardness (p < 0.05), reduced the gumminess (p < 0.05), and delayed the decline in the viscosity of rice paste by two months after one-year storage, compared with other treatments. In conclusion, although EN application resulted in an inferior texture of rice, it delayed the quality change by two months during storage. It was demonstrated that a rational nitrogen application rate (0–260 kg N/ha) for rice cultivation is particularly important to obtain high ECQ; however, EN may be beneficial for the stability of the ECQ during storage.

scholarly journals EFFECTS OF CONTROLLED-RELEASE AND LIQUID FERTILIZATION ON LEATHERLEAF FERN AND NITROGEN LEACHING

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 582f-583
Author(s):  
Robert H. Stamps
Keyword(s):  
Controlled Release ◽  
Fine Sand ◽  
Fertilization Rate ◽  
Application Rate ◽  
Vase Life ◽  
N Leaching ◽  
Application Rates ◽  
One Year ◽  
Liquid Fertilization ◽  
Intact Soil

Established leatherleaf fern was grown for one year in a glasshouse in intact soil columns (Astatula fine sand, 21 × 61 cm) contained in drainage lysimeters. Columns were fertilized at rates of 224, 448, or 672 kg N ha-1 yr-1 using controlled-release (CR) fertilizer, either 360-day (360CR) or 180-day (180CR) term, or weekly applications of liquid (L) fertilizer. Water use, yield (number of harvestable fronds) and average frond weight increased linearly with increasing fertilization rate and more fronds were produced using L than CR fertilizers. Frond color measurements paralleled yield results. During cool weather when vase life is greatest, fronds from L fertilizer lysimeters lasted longer than fronds from CR treated plots. During warmer weather, treatments had no effect on vase life. Nitrate nitrogen (NO3-N) leaching increased with fertilization rate and exceeded 10 ppm in leachate from the L and 180CR treatments at all application rates. NO3-N in leachate from 360CR lysimeters never exceeded 8 ppm at any application rate.

scholarly journals Effect of Sulphur on the Yield and Quality of Potato Varieties in Tista Meander Floodplain Soil of Bangladesh

2019 ◽  
pp. 1-8
Author(s):  
M. Waliur Rahman ◽  
Saiful Islam ◽  
M. Monirul Islam ◽  
M. Sazzad Hossain
Keyword(s):  
Specific Gravity ◽  
Significant Influence ◽  
Dry Matter ◽  
Tuber Yield ◽  
Starch Content ◽  
Dry Matter Yield ◽  
Potato Varieties ◽  
Yield And Quality ◽  
Starch Yield

A field experiment was carried out at Breeder seed Production Centre (BSPC), Debiganj, Panchagarh during the Rabi season of 2016-2017 to study the effect of five levels of sulphur application on yield and quality attributes of three potato varieties. The main objective of the experiment was to determine the effect of sulphur on the yield and quality of potato varieties. There were five treatments comprising different levels of sulphur such as T1 (control-no sulphur), T2 (75% RDS), T3 (100% RDS), T4 (125% RDS) and T5 (150% RDS). Three BARI released potato variety; BARI Alu 36 (4.26 R), BARI Alu 40 (4.45W) and BARI Alu 25 (Asterix) were used in this experiment. The experiment was laid out in a randomized complete block design (RCBD) with three replications. The tuber yield and yield contributing characters were significantly influenced by the application of sulphur. Maximum tuber yield (39.28 t/ha) was recorded in BARI Alu 40 (4.45 w). Highest dry matter content, specific gravity and starch content were found in BARI Alu 40 (4.45 w), which was followed by BARI Alu 36 (4.26 R) in case of specific gravity and starch content. Sulphur application in potato varieties showed significant influence on tuber yield of potato. This parameter increased with increasing dose of sulphur up to 100% RDS. Thereafter, further increase in sulphur did not showed any remarkable influence. Besides, sulphur application in potato varieties showed significant influence on tuber quality of potato. The maximum dry matter yield and starch yield were recorded in the treatment T3, which was followed by all other  treatments except T1. The minimum dry matter yield and starch yield were recorded in the treatment T1. Combined effect showed insignificant influences between varieties and sulphur levels. BARI Alu 40 (4.45 w) was found superior over other varieties in terms of yield and quality attributes. Treatment T3 (100% RDS) was found superior over other treatments in terms of yield. 

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