Effects of Different Fertilization Methods on Organic Nitrogen Components in Paddy Soil

2014 ◽  
Vol 955-959 ◽  
pp. 1116-1119
Author(s):  
Ji Wang ◽  
Yun Jiang Liang ◽  
Min Jie Fu ◽  
Ze Yu Guan
Keyword(s):  
Significant Influence ◽  
Paddy Field ◽  
Organic Nitrogen ◽  
Organic Fertilizer ◽  
Total Acid ◽  
Total Organic Nitrogen ◽  
Total N ◽  
Soil Organic Nitrogen ◽  
Hydrolysable N

In order to reveal characteristics of soil organic nitrogen components under long-term different fertilization methods on paddy field, selected 7 typical paddy field of Korean Autonomous Prefecture of Yanbian of Jilin Province, collected soil samples of 0 to 10 cm and 10 to 20 cm, analyzed total nitrogen content of soil and each component of organic nitrogen. Results showed that effects of different fertilization methods on content of soil total acid hydrolysable N (TAHN), amino acid N (AAN), ammonia sugar N (ASN), acid-hydrolysable unknown N (AUN) in 0 to 10 cm soil had significant influence or more, and non hydrolysable N (NHN), AAN and ASN accounted for proportion of total N (TN) had significant influence. Effects soil organic nitrogen components in 10 to 20 cm soil had not significant influence. Applying organic fertilizer was beneficial to improve soil total organic nitrogen, mainly by improving content of AAN and ASN; Long-term application inorganic fertilizer led to NHN accumulation, but applying organic fertilizer was beneficial to NHN transformation, increase content of AAN; TAHN, NHN, AN, AAN, ASN content in 0 to 10 cm soil were slightly higher than that in 10 to 20 cm soil, and content of HUN had no obvious regularity between two soil layers.

Tillage effects on labile pools of soil organic nitrogen in a semi-humid climate of Argentina: A long-term field study

2017 ◽  
Vol 169 ◽  
pp. 71-80 ◽  
Author(s):  
Juan M. Martínez ◽  
Juan A. Galantini ◽  
Matias E. Duval ◽  
Fernando M. López
Keyword(s):  
Field Study ◽  
Organic Nitrogen ◽  
Humid Climate ◽  
Soil Organic Nitrogen ◽  
Term Field

scholarly journals Long-term effects of continuous cropping and different nutrient management practices on the distribution of organic nitrogen in soil under rice-wheat system

2014 ◽  
Vol 60 (No. 2) ◽  
pp. 63-68 ◽  
Author(s):  
J. Kaur ◽  
Singh JP
Keyword(s):  
Amino Acid ◽  
Management Practices ◽  
Nutrient Management ◽  
Amino Sugar ◽  
Inorganic Fertilizer ◽  
Inorganic Fertilizers ◽  
Total N ◽  
Organic Manures ◽  
Hydrolysable N

A long-term experiment was used to evaluate the effects of different nutrient management practices on the distribution of soil organic N fractions and their contribution to N nutrition of a rice-wheat system. Continuous rice-wheat cultivation for 13 years without any fertilization was unable to maintain total soil nitrogen level to its original level and resulted in a decrease at 8.3 mg N/kg/year. Likewise, amino acid N, amino sugar N, ammonia N, hydrolysable unknown N, total hydrolysable N and non-hydrolysable N decreased by 37.2, 29.6, 33.7, 10.4, 26.6 and 20.4%, respectively over their initial status. However, application of inorganic fertilizers alone or in combination with organic manures led to a marked increase in total N and its fractions. The increase in total N with the application of farmyard manure, press mud and green manure along with inorganic fertilizer over treatment with inorganic fertilizer alone was 23.1, 34.4 and 7.0%, respectively. These results imply that integrated use of inorganic fertilizers with organic manures represent a sound practice for sustaining N reserves in soil. On average, amino acid-N, amino sugar-N, ammonia-N and hydrolysable unknown-N constituted about 27.9, 10.7, 28.7 and 32.7% of the total hydrolysable-N, respectively.

scholarly journals Identification of Soil Organic Nitrogen Substance Acting as Indicator of Response of Cocoa Plants to Nitrogen Fertilizer

2008 ◽  
Vol 24 (2) ◽  
Author(s):  
John Bako Baon
Keyword(s):  
Theobroma Cacao ◽  
Organic Nitrogen ◽  
Growth Parameters ◽  
Dry Weight ◽  
N Fertilizer ◽  
Organic N ◽  
Soil Organic Nitrogen ◽  
Hydrolysable N ◽  
Stem Leaf ◽  
N Fractions

An indicator needed for estimating the presence of response of cocoa (Theobroma cacao) trees to nitrogen (N) fertilizer has been well understood, however there is still little progress on the work on identification of organic N fraction which regulates the response of cocoa to N fertilizer. The objective of this study is to identify a fraction of soil organic N which is very closely related with degree of cocoa response to N fertilizer. Hydrolyses were performed on soil samples derived from 23 sites of cocoa plantations distributed both in Banyuwangi district (12 sites) and in Jember district (11 sites). Analysis of organic N fractions consisted of total hydrolysable N, ammonium N, amino sugar N, amino acid N and combinations of those fractions. To investigate the level of cocoa plants response to N fertilizer, seedlings of cocoa were planted in plastic pots treated with and without urea as source of N. Degree of response of cocoa plants to N fertilizer was measured based on growth parameters, such as plant height, leaf number, stem girth, fresh weight of stem, leaf and shoot; and dry weight of stem, leaf and shoot. Results of this study showed that biggest response of cocoa was shown by dry weight of leaf at the level of 29,22% (in the range of -17,43% – 95,98%), whereas the smallest response was shown by stem dry weight at the level of -1,04 (in the range of -26,16 – 47,54). From those of organic N fractions analyzed, only N ammonium did not show any significant correlations with all the growth parameters observed. Leaf dry weight was the most closely related parameter with nearly all organic N fractions followed by shoot dry weight and stem girth. The soil organic N fraction which had very significant relation with cocoa plant response was total hydrolysable N. Using the method of Cate-Nelson, it was revealed that cocoa gardens contain total hydrolysable N less than 1273 mg/kg were classified as responsive to N fertilizer.Key words: plant response, Theobroma cacao, soil organic nitrogen, N fertilizer, soil testing, fertilization, soil variability, soil hydrolysis

EFFECTS OF INORGANIC AND ORGANIC NITROGEN APPLIED THE YEAR PREVIOUS ON EARLY GREEN COLOR RETURN OF KENTUCKY BLUEGRASS

1977 ◽  
Vol 57 (1) ◽  
pp. 155-158 ◽  
Author(s):  
S. H. NELSON
Keyword(s):  
Woody Plants ◽  
Organic Nitrogen ◽  
Poa Pratensis ◽  
Organic Fertilizer ◽  
Regression Line ◽  
Kentucky Bluegrass ◽  
Organic N ◽  
Inorganic N ◽  
Total N ◽  
Green Color

Total N applied during the main summer fertilizing program influenced the early green color return of Kentucky bluegrass (Poa pratensis L.) the following spring. Where inorganic N was the only source, there was a highly significant positive correlation between the total amount of N and the early green color return in the spring. The results were linear within the range tested (0.83–2.41 kg/100 m2 actual) and all treatments fell within the confidence limits. When two applications of organic N were used with one application of inorganic N, no trend was established within the range of 1.00–1.88 kg/100 m2. In these latter combinations, there was a response to varying amounts of inorganic N, but not with organic N. The high correlations and nature of the fit to the regression line would suggest a "luxury uptake" of inorganic N and overwinter storage by the turf grass similar to that reported in some woody plants. Since the plots receiving organic fertilizer went dormant early in the fall, such uptake is not likely and the early green color return would seem to be dependent on the bacterial release of N from the organic residues within the soil as the temperature increased.

scholarly journals Pengaruh Pola Rotasi Tanaman terhadap Perbaikan Sifat Tanah Sawah Irigasi

2020 ◽  
Vol 12 (1) ◽  
pp. 49
Author(s):  
Agus Suprihatin ◽  
Johanes Amirullah
Keyword(s):  
Crop Rotation ◽  
Paddy Field ◽  
Clay Fraction ◽  
Chemical Properties ◽  
Paddy Fields ◽  
Total N ◽  
Chemical Balance ◽  
Continuous Application ◽  
Nitrogen Nutrients

<p>Abstrak. Penggenangan terus-menerus di lahan sawah akan berpengaruh terhadap keseimbangan kimia dan biologi tanah. Pergantian aerobik dan anaerobik di lahan sawah merupakan satu kontrol alami yang efektif mengendalikan keseimbangan biologi dan nonbiologi sehingga tanah sawah menjadi sehat dan tetap produktif. Penerapan rotasi tanamanantara tanaman padi dengan palawija maupun hortiklutura merupakan salah alternatif yang bijak untuk tetap mempertahankan produktivitas dan kesuburan lahan, dan perekonomian petani. Penerapan rotasi tanam memiliki peranan terhadap beberapa aspek antara lain agronomi, ekonomi dan lingkungan. Pengelolaan lahan pertanian tanah sawah secara terus-menerus pada berbagai rotasi tanam dapat meningkatkan berat jenis tanah, dan persentase fraksi lempung dalam tanah sawah. Rotasi tanaman padi-palawija/hortikultura dapat memperbaiki srtuktur tanah melalui peningkatan nilai MWD. Penerapan rotasi tanaman secara terus-menerus berpengaruh nyata terhadap perubahan sifat kimia tanah seperti pH, N-total, P dan K-tersedia, KPK tanah, dan C-organik. Penerapan rotasi tanaman padi-jagung pada 1 – 2 tahun pertama memberikan kadar N-total tanah, NO<sub>3</sub><sup>-</sup> dan DOC yang sangat tinggi. Penanaman jagung di musim kemarau pada rotasi tanaman padi-jagung dapat menyimpan air dan menekan pencucian hara, daripada penanaman padi-padi dalam jangka panjang. Pengembalian nutrisi nitrogen dalam rotasi tanaman dapat dilakukan melalui penanaman tanaman legum setelah penanaman tumbuhan serealia dan sejenisnya.</p><p>Abstract. Continuous flooding in paddy fields will disrupt the biological and chemical balance of the soil. Substitution of aerobics and anaerobics in paddy fields is a natural control that effectively controls the biological and nonbiological balance so that the paddy fields become healthy and remain productive. Application of plant rotation between rice plants with crops and horticulture is a wise alternative to maintain the productivity and fertility of paddy field, and the economy of farmer. Application of rotation has a role to play on several aspects such as agronomy, economy and environment. Continuous management of paddy field on various rotations of cropping can increase bulk density, and the percentage of clay fraction in paddy soil. Rotation of rice-upland/horticulture can improve soil structure by increasing the value of MWD. Continuous application of crop rotation has a significant effect on changes in soil chemical properties such as pH, totalN, available P and K, CEC, and organic carbon. The application of rotation of rice-maize in the 1–2 years can give very high total N, NO<sub>3</sub><sup>-</sup> and DOC levels. The planting of maize in the dry season on a rotation of rice-maize can store water and suppress nutrient leaching, rather than long-term rice-rice cultivation. Return of nitrogen nutrients in crop rotation can be done through planting legumes after planting cereals and the like.</p>

scholarly journals The Effect of Land use and Subsidized Fertilizer for Rice Production Case Study: Tangerang District, Banten

2021 ◽  
Vol 232 ◽  
pp. 01008
Author(s):  
Tian Mulyaqin ◽  
Septi Kusumawati ◽  
Nita Winanti ◽  
Kardiyono
Keyword(s):  
Land Use ◽  
Paddy Field ◽  
Agricultural Land ◽  
Organic Fertilizer ◽  
Rice Production ◽  
Land Conversion ◽  
Interview Survey ◽  
Significant Factors

Tangerang District is one of the rice producers in Banten Province. The intensification of rice production is one of the solutions due to the agricultural land conversion problem in Tangerang. The purpose of this study is to analyze the farmer perception about subsidized fertilizer and we also analyze the effect of land use and subsidized fertilizer for rice production at the farmer level in Tangerang. The data used in this study were collected through an interview survey using a structured questioner to 35 respondents in Tangerang in 2016. The data were analyzed using descriptive and quantitative analysis. The result showed that the farmers perceive that the availability of subsidized fertilizer is frequently rare especially for nitrogen fertilizer and phosphorus fertilizer. The study also shows the rice production at the farmer level was affected by land use, the application of subsidized urea fertilizer, the application of organic fertilizer, and the application of returning the straw to the paddy field. All of these significant factors on rice production were inelastic in the short term and long term. It is important to decrease agricultural land conversion and returning the straw to the paddy field to maintaining rice production in Tangerang.

Cadmium Accumulation in Soil and Celery from a Long-Term Manure Applied Field Experiment

2013 ◽  
Vol 726-731 ◽  
pp. 269-272
Author(s):  
Qin Ping Sun ◽  
Ji Jin Li ◽  
Ben Sheng Liu ◽  
Li Juan Gao ◽  
Jun Xiang Xu ◽  
...  
Keyword(s):  
Field Experiment ◽  
Organic Fertilizer ◽  
Soil Condition ◽  
Cadmium Accumulation ◽  
Middle Level ◽  
Total N ◽  
History Of ◽  
High Level ◽  
Soil Cd

A field experiment with six treatments was conducted from Apr. 2006 to Nov. 2008 to study the Cadmium (Cd) accumulation in soil and the effect on the plant uptake after a three years application with using different organic fertilizer. The six treatments were (1)Control (with no manure input), (2)Cattle compost, (3)Biogas residua, (4)Chicken compost (with low level input), (5)Chicken compost (with middle level input), (6)Chicken compost (with high level input). The treatments (2), (3) and (5) had the same total N input. The results showed that the soil ETPA-Cd from manured treatments had increased trend compared with the control after 3 years. The celery which was the last crop during the whole cropping history of the manured treatments (except Biogas residua) had higher Cd content compared with the control, and celery of the chicken compost with high level input had highest Cd content than others. There was a significant relationship (r=0.92**) between the soil Cd content and the celery Cd content. However the soil Cd limitation laws in some countries seem to be strict than the celery Cd limitation law under this soil condition.

Comparative Labelling and Biokinetic Studies of 99mTc-EDTA(Sn) and 99mTc-DTPA(Sn)

1977 ◽  
Vol 16 (01) ◽  
pp. 30-35 ◽  
Author(s):  
N. Agha ◽  
R. B. R. Persson
Keyword(s):  
Complex Formation ◽  
Significant Influence ◽  
Room Temperature ◽  
Ph Value ◽  
Maximum Activity ◽  
Reduction Step ◽  
Labelling Yield ◽  
Different Temperatures ◽  
Kinetics Of

SummaryGelchromatography column scanning has been used to study the fractions of 99mTc-pertechnetate, 99mTcchelate and reduced hydrolyzed 99mTc in preparations of 99mTc-EDTA(Sn) and 99mTc-DTPA(Sn). The labelling yield of 99mTc-EDTA(Sn) chelate was as high as 90—95% when 100 μmol EDTA · H4 and 0.5 (Amol SnCl2 was incubated with 10 ml 99mTceluate for 30—60 min at room temperature. The study of the influence of the pH-value on the fraction of 99mTc-EDTA shows that pH 2.8—2.9 gave the best labelling yield. In a comparative study of the labelling kinetics of 99mTc-EDTA(Sn) and 99mTc- DTPA(Sn) at different temperatures (7, 22 and 37°C), no significant influence on the reduction step was found. The rate constant for complex formation, however, increased more rapidly with increased temperature for 99mTc-DTPA(Sn). At room temperature only a few minutes was required to achieve a high labelling yield with 99mTc-DTPA(Sn) whereas about 60 min was required for 99mTc-EDTA(Sn). Comparative biokinetic studies in rabbits showed that the maximum activity in kidneys is achieved after 12 min with 99mTc-EDTA(Sn) but already after 6 min with 99mTc-DTPA(Sn). The long-term disappearance of 99mTc-DTPA(Sn) from the kidneys is about five times faster than that for 99mTc-EDTA(Sn).

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