Preparation and properties of a double-coated slow-release NPK compound fertilizer with superabsorbent and water-retention

2008 ◽  
Vol 99 (3) ◽  
pp. 547-554 ◽  
Author(s):  
Lan Wu ◽  
Mingzhu Liu ◽  
Rui Liang
Keyword(s):  
Water Retention ◽  
Slow Release ◽  
Compound Fertilizer

scholarly journals Effects of different fertilizer ratio on senescence of flag leaf in winter wheat

2020 ◽  
Vol 49 (1) ◽  
pp. 85-90
Author(s):  
Yafei Wang ◽  
Yan Shi
Keyword(s):  
Winter Wheat ◽  
Water Retention ◽  
Slow Release ◽  
Flag Leaf ◽  
High Yield ◽  
Flag Leaves ◽  
Slow Release Fertilizer ◽  
Compound Fertilizer ◽  
Mda Content ◽  
Use Efficiency

In order to increase the fertilizer use efficiency, the effects of different ratio of slow-release fertilizer, water retention agent and compound fertilizer in wheat production on senescence of flag leaf in winter wheat had been studied. The results showed that, water retaining agent 15 kg/ha with slow-release fertilizer 324 kg/ha and compound fertilizer 324 kg/ha (T2) effectively maintained the activities of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) activity and soluble protein content in wheat flag leaves after flowering, and reduced the malondialdehyde (MDA) content which could delay the flag leaves senescence and gain high yield in wheat.

Effect of slow-release compound fertilizer on nitrogen nutrient in soil and rye-grass

2010 ◽  
Vol 18 (5) ◽  
pp. 929-933 ◽  
Author(s):  
Hong-Xia ZHU ◽  
Yan DONG ◽  
Zheng-Yin WANG
Keyword(s):  
Slow Release ◽  
Rye Grass ◽  
Compound Fertilizer

scholarly journals Kinetika Slow Release Pupuk Urea Berlapis Chitosan Termodifikasi

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
YC Danarto ◽  
Anggita Nugrahey ◽  
Sela Murni Noviani
Keyword(s):  
Water Retention ◽  
Slow Release ◽  
Zero Order ◽  
Release Profile ◽  
Nitrogen Release ◽  
Diffusion Kinetic ◽  
Urea Fertilizer ◽  
First Order ◽  
Modified Chitosan ◽  
Urea Content

<p>During this time, the use of urea is not efficient, because about 40-70% of nitrogen in the fertilizer is not absorbed by plants. In order to increase the effectivity of nitrogen release in urea fertilizer, it needs to be coated with modified chitosan as slow releasing agent to form a hydrogel material by forming a cross linking with glutaraldehyde cross-linker.The aims of this research is to study the mechanism and the appropriate kinetic model of nitrogen release in slow releasing fertilizer of modified chitosan. This research was conducted by analyzing the ability of bio-hydrogel by calculating the percentage of swelling ratio and water retention of hydrogel and the nitrogen release in slow releasing fertilizer both in the soil and water. The experiments were conducted by varying the amount of urea used which  30 gram, 40 gram, 50 gram, 60 gram and 70 gram of urea fertilizer. The The release profile is then plotted on several models of diffusion kinetic such as zero order, first order, higuchi and korsmeyer peppas. The appropriate model of diffusion kinetic is chosen by the largest correction factor (R2).The results showed that nitrogen release of the slow releasing fertilizer in the soil with 50% urea content  and  the  water  followed  korsmeyer  peppas  model  with  fickian  mechanism. Nitrogen release in the soil with urea content of 30%, 40%, 60%, and 70% followed the korsmeyer peppas model with nonfickian mechanism.</p>

Application of Slow-Release Fertilizer with the Function of Water-Absorption and Water-Retention in Position Engineering Camouflage

2011 ◽  
Vol 117-119 ◽  
pp. 1100-1102
Author(s):  
Shao Hong Li ◽  
Yue Guo Shen ◽  
Zhong Feng Shi
Keyword(s):  
Water Absorption ◽  
Water Retention ◽  
Slow Release ◽  
Rock Slopes ◽  
Slow Release Fertilizer ◽  
The Earth ◽  
Earth Slopes

The construction of position engineering causes a lot of naked earth slopes and rock slopes. Because the earth and rock lack of water absorption and water retention, traditional vegetation camouflage can not make it. The slow-release fertilizer with the function of water-absorption and water-retention make up it and which will be applied widely in vegetation camouflage of position engineering.

Preparation and properties of a slow release NP compound fertilizer with superabsorbent and moisture preservation

2005 ◽  
Vol 96 (6) ◽  
pp. 2132-2138 ◽  
Author(s):  
Mingyu Guo ◽  
Mingzhu Liu ◽  
Zheng Hu ◽  
Falu Zhan ◽  
Lan Wu
Keyword(s):  
Slow Release ◽  
Compound Fertilizer
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