scholarly journals The impact of land fragmentation on farmer's chemical fertilizer use efficiency

2019 ◽  
Vol 34 (12) ◽  
pp. 2687
Author(s):  
SHI Chang-liang ◽  
ZHANG Yi ◽  
GUO Yan ◽  
ZHU Jun-feng
Keyword(s):  
Chemical Fertilizer ◽  
Fertilizer Use Efficiency ◽  
Land Fragmentation ◽  
Fertilizer Use ◽  
Use Efficiency ◽  
The Impact

scholarly journals Evaluating Fertilizer Use Efficiency and Spatial Correlation of Its Determinants in China: A Geographically Weighted Regression Approach

2020 ◽  
Vol 17 (23) ◽  
pp. 8830
Author(s):  
Xiuguang Bai ◽  
Tianwen Zhang ◽  
Shujuan Tian
Keyword(s):  
Negative Impact ◽  
Training System ◽  
Western China ◽  
Weighted Regression ◽  
Fertilizer Use Efficiency ◽  
Fertilizer Use ◽  
Agricultural Employment ◽  
Use Efficiency ◽  
Influence Degree ◽  
The Impact

Improving fertilizer use efficiency (FUE) is an effective means to reduce fertilizer use and environmental contamination. Few studies have considered the spatial effects of FUE and its determinants. This paper calculated the FUE of agricultural production by adopting panel data on 31 provinces in China from 2007 to 2017 using a stochastic frontier method with a heteroscedastic inefficiency term, and discussed the spatial characteristics. Further, the geographical weighted regression model (GWR) was employed to examine the spatial impact of factors on FUE and revealed the spatial dispersion and agglomeration effect. The results show that averaged FUE in China was 0.722, and had a significantly decreasing trend with a significant regional difference and spatial positive correlation in different provinces. The non-agricultural employment ratio was the leading factor for increasing FUE, and its degree of influence showed a decreasing trend from eastern to western China. The different agricultural industry development modes, crop planting patterns adjustment, labor transfer, and policy incentive systems for increasing the non-agricultural employment ratio should be developed for different regions. Farmers’ income had a negative impact on FUE, but the influence degree decreased annually. Education level had a negative impact on FUE and was relatively weak, but the influence degree was increasing. This should strengthen the exploration of a scientific and practical technical training system for farmers on fertilizer use while improving educational levels in different regions on the basis of local characteristics. The impact of disasters on FUE depended on their severity, and a combined weather and disaster forecasting mechanism should be developed.

scholarly journals Replacing 30 % chemical fertilizer with organic fertilizer increases the fertilizer efficiency, yield and quality of cabbage in intensive open-field production

2022 ◽  
Vol 52 (7) ◽  
Author(s):  
Xinwei Cui ◽  
Hongling Lu ◽  
Yaoxiong Lu ◽  
Peng Gao ◽  
Fuyuan Peng
Keyword(s):  
Organic Fertilizer ◽  
Soluble Sugar ◽  
Chemical Fertilizer ◽  
Fertilizer Efficiency ◽  
Marketable Yield ◽  
Fertilizer Use Efficiency ◽  
Fertilizer Use ◽  
Yield And Quality ◽  
Use Efficiency

ABSTRACT: The combined application of chemical fertilizer and organic fertilizer is an effective way to improve soil fertility, crop yield and quality. In this study, a field experiment was conducted to evaluate the yield, quality and fertilizer use efficiency of cabbage (Brassica oleracea var. capitata L.) grown under different ratios of organic fertilizer replacing chemical fertilizer at a rate of 225 kg N ha-l in 2019 and 2020. The fertilizer treatments included N0 (non nitrogen fertilizer), CK (only compound fertilizer was applied, N:P:K=15.0 %:6.5 %:12.4 %), T1, T2 and T3 (organic fertilizer replaced 15 %, 30 % and 45 % chemical fertilizer, respectively), and T4 (total nutrient input was reduced by 10 % under T2). Results showed that T2 had the highest marketable yield and fertilizer use efficiency, as well as the best quality. The marketable yield, vitamin C content, soluble sugar content, REN (apparent uptake efficiency of fertilizer N) and AEN (agronomic N use efficiency) of T2 increased by 32.2 %, 14,9 %, 5.5 %, 97. % and 55.6 %, respectively, in contrast, the crude fibers decreased by 34.0 %, compared with CK in the two years. In addition, T4 guaranteed the yield and moderately improved the quality of cabbage, compared with CK. Therefore, we can alternatively apply fertilization according to the purpose of capturing the highest yield or properly declining fertilizer to sustain soil texture and productivity.

Estimated changes in soil carbon associated with agricultural practices in Canada

2001 ◽  
Vol 81 (2) ◽  
pp. 221-227 ◽  
Author(s):  
W N Smith ◽  
R L Desjardins ◽  
B. Grant
Keyword(s):  
Soil Carbon ◽  
Agricultural Practices ◽  
Crop Rotations ◽  
Nitrous Oxide Emissions ◽  
Century Model ◽  
Management Options ◽  
Fertilizer Use Efficiency ◽  
Fertilizer Use ◽  
Use Efficiency ◽  
The Impact

The Century model was used to estimate the influence of changing agricultural practices on C levels in seven major soil groups in Canada for the years from 2000 to 2010. Conversion of arable land to permanent cover, and inclusion of forages in crop rotations would result in the greatest sequestration of C, averaging 0.62 and 0.44 Mg C ha–1 yr–1, respectively. The increase in soil C when conventional-tillage is converted to no-tillage management was estimated to average about 0.13 Mg C ha–1 yr–1. Reduction of summerfallow (wheat-fallow to wheat-wheat-fallow) in the arid and semi-arid chernozems of Western Canada would reduce C losses by about 0.03 Mg C ha–1 yr–1. If fertilizer use efficiency was increased by 50%, 0.04 Mg C ha–1 yr–1 would be sequestered, whereas a decrease of 50% in fertilizer use efficiency would result in a loss of 0.05 Mg C ha–1 yr–1. Timing of N application (fall vs. spring) had little effect on C change. This study indicates that there are several feasible techniques that could be adopted by agricultural producers in Canada that would significantly increase CO2 uptake from the atmosphere. Although our estimates are based on changes in individual management options, we recognize that producers are likely to adopt several options at the same time. Any interactions resulting from such a move have not been assessed in this analysis, in particular the impact on N2O emissions. Key words: Soil carbon, CO2, C sequestration, Century model, soil, tillage, agricultural practices, nitrous oxide emissions, crop rotations

Sign in / Sign up

Export Citation Format

Share Document