scholarly journals Response of Cabbage Plants (Brassica oleraceae var. capitata L. ) to Fertilization with Chicken Manure, Mineral Nitrogen Fertilizer and Humic Acid

2010 ◽  
Vol 31 (OCTOBER- DECEMBER) ◽  
pp. 416-432
Keyword(s):  
Humic Acid ◽  
Nitrogen Fertilizer ◽  
Mineral Nitrogen ◽  
Chicken Manure ◽  
Brassica Oleraceae

scholarly journals Replacing Synthetic Nitrogen Fertilizer with Different Types of Organic Materials Improves Grain Yield in China: A Meta-Analysis

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2429
Author(s):  
Xiaoru Fan ◽  
Zekai Chen ◽  
Zihan Niu ◽  
Ruiyao Zeng ◽  
Jingmin Ou ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Fertilizer ◽  
Organic Materials ◽  
Crop Yields ◽  
Meta Analysis ◽  
Chicken Manure ◽  
Agricultural Practice ◽  
Different Types ◽  
Synthetic Nitrogen Fertilizer

Synthetic nitrogen fertilizer substitution (NSS) with different types of organic material is a cleaner agricultural practice for reducing the application of synthetic N input in farmlands while also relieving the environmental issues caused by the discharge of organic wastes. However, the effects of the NSS practice on crop yields, being the primary objective of agricultural activity, is still uncertain in China. This study conducted a meta-analysis to assess the impacts of the NSS practices with different types of organic materials on crop yields. Results showed that the average crop yield was increased by 3.4%, with significant differences under NSS, thereby demonstrating that this practice contributed to improving crop yields, especially of rice and maize. According to published reports, the NSS practices involving chicken manure, pig manure, and crop straw increased crop yields by 4.79, 7.68, and 3.28%, respectively, with significant differences, thus demonstrating the superior effects needed for replacing synthetic N fertilizer. Moreover, substitution ratios (SR) between 0% and 60% could be suggested when using the NSS practice, with the high SR recommended when the original soil fertility was adequate for crops. Considering the long-term effects of applied organic materials, improving the grain yield with the NSS practice should be expected in the long-term. By effectively applying the NSS, this study attempted to scientifically decide on the type of organic materials and the appropriate SR based on the conditions of the soil and the crop. The results provide research information for the development of clean agricultural production and food security in China.

The effect of wet season land treatment and nitrogen fertilizer on safflower, linseed, and wheat in the Ord River valley. 1. Soil and crop nitrogen

1968 ◽  
Vol 8 (30) ◽  
pp. 59 ◽  
Author(s):  
R Wetselaar ◽  
DF Beech
Keyword(s):  
Ammonium Sulphate ◽  
Nitrogen Fertilizer ◽  
Mineral Nitrogen ◽  
Plant Performance ◽  
Research Station ◽  
Wet Season ◽  
Nitrogen Yield ◽  
Nitrogen Yields ◽  
Four Levels ◽  
Highly Correlated

Safflower, linseed, and wheat were grown under irrigation at Kimberley Research Station in the 1964 dry season following 6 and 18 month clean and weedy fallows. Four levels of nitrogen fertilizer, as ammonium sulphate and urea, were superimposed. Crop nitrogen yields were highest after 18 months clean fallow, and were highly correlated with the amount of nitrate-nitrogen that had accumulated in the soil profile during the preceding fallow period. For wheat, which was the most efficient user of mineral nitrogen, 160 lb nitrogen an acre as ammonium sulphate was required after 18 months weedy fallow to equal the crop nitrogen yield after 18 months clean fallow without nitrogen fertilizer. The mean crop nitrogen yield with urea was only 76.7 per cent of that with ammonium sulphate. The results indicate that the form, and possibly the distribution, of mineral nitrogen in the soil in the early stages of crop growth could be important factors determining the efficiency of nitrogen for optimum plant performance.

Effect of nitrogen fertilizer applied to winter oilseed rape (Brassica napus) on soil mineral nitrogen after harvest and on the response of a succeeding crop of winter wheat to nitrogen fertilizer

1996 ◽  
Vol 126 (1) ◽  
pp. 63-74 ◽  
Author(s):  
M. A. Shepherd ◽  
R. Sylvester-Bradley
Keyword(s):  
Organic Matter ◽  
Oilseed Rape ◽  
Nitrogen Fertilizer ◽  
Organic Matter Content ◽  
Matter Content ◽  
Mineral Nitrogen ◽  
Fertilizer N ◽  
Soil Mineral ◽  
Soil Mineral Nitrogen ◽  
Optimum Amount

SUMMARYSoil mineral nitrogen (Nmin) was measured to 90 cm at a total of 12 sites in the UK in the autumn after an oilseed rape experiment, which measured responses to fertilizer N. On average, Nmin, increased by 15 kg/ha per 100 kg/ha fertilizer nitrogen (N) applied to the rape, up to the economic optimum amount of N (Nmin). There were larger increases in Nmin where fertilizer applications exceeded Nopt, thus super-optimal fertilizer applications disproportionately increased the amount of nitrate likely to leach over-winter. The small effects of sub-optimal N on Nmin were associated with large increases in N offtake by the oilseed rape, whereas the larger effects of super-optimal N on Nmin were associated with only small increases in N offtake. Over 70% of the variation in autumn Nmin was explained by the previous rape's N fertilizer rate and the topsoil organic matter content.Nitrogen applied to the rape increased grain yields of the succeeding wheat crops when no further fertilizer N was applied to the wheat. It was concluded that N applied to oilseed rape significantly affected Nmin after harvest, and these effects were not completely nullified by leaching over-winter, so soil N supply to the succeeding wheat crop was significantly increased. Responses in grain yield indicated that each 100 kg/ha N applied to the rape provided N equivalent to c. 30 kg/ha for the following cereal. Each 1% of soil organic matter further contributed N to the wheat, equivalent to 25 kg/ha.It is important to ensure that oilseed rape receives no more than the optimum amount of fertilizer N if subsequent leaching is to be minimized. Reductions below optimum amounts will have only a small effect on leaching. Substantial changes in the economic optimum N for rape production should be accompanied by adjustment in fertilizer N application to following wheat crops. Fertilizer recommendation systems for wheat should take account of the fertilizer N applied to the preceding oilseed rape and the topsoil organic matter content.

scholarly journals Combination of Sinabung Volcanic Ash and Humic Acid Against Characteristics of Humid Silica Fertilizers

2019 ◽  
Vol 2 (2) ◽  
pp. 108
Author(s):  
Veny Apriyani ◽  
Thomson A.S Girsang ◽  
Ribka Sirait ◽  
Lisnawaty Simatupang
Keyword(s):  
Humic Acid ◽  
Sodium Hydroxide ◽  
Volcanic Ash ◽  
Chicken Manure ◽  
Sio2 Content ◽  
Acid Extract ◽  
Organic C ◽  
Acidic Nature

Volcanic ash from Mount Sinabung has a large silica (SiO2) content of 69,93% and contains minerals needed by soil and plants. This potential cannot be directly utilized due to the acidic nature of volcanic ash which can damage plants. To be used as fertilizer, the process can be accelerated by adding humic acid from chicken manure. So the purpose of this study is to manufacture humic silica fertilizer by combining volcanic ash with humic acid from chicken manure and and  the characteristics of humic silica fertilizer. In this study a method of extracting humic acid from chicken manure was used using sodium hydroxide (NaOH) 0,25 M solution and mixing volcanic ash with humic acid. The results of humic acid extract from chicken manure were then combined with volcanic ash from sinabung. Nutrients from the combination obtained at variation 60:40 with the highest organic C were 1.37%, N total 0.24%, Phosphate 20.64 ppm and Potassium 0.664 me / 100g with pH fertilizer 6 and crumb texture and free neutral which indicates the fertilizer is ready to use.

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