What Motivates Greenhouse Vegetable Farmers to Adapt Organic-Substitute-Chemical-Fertilizer (OSCF)? An Empirical Study from Shandong, China
Abstract
:1. Introduction
2. Determinants of Vegetable Farmers’ Behaviour Regarding Crop Fertilization
3. Methods and Materials
3.1. Data Collections
3.2. Variable Selections
3.3. Empirical Models
3.3.1. Logit Model
3.3.2. Karlson–Holm–Breen-Method (KHB-Method)
4. Results
4.1. Impact of Two Policy Measures (Training and Subsidies) on Farmers’ OSCF Behaviour
4.2. The Role of Farmers’ Cognition and Farmers’ OSCF Adoption Behaviour
4.3. The Path of Farmers’ Cognition and Farmers’ OSCF Adoption Behaviour
5. Discussion
5.1. Different Contributions between Training and Subsidy
5.2. Variability in the Mediating Role of Farmers’ Cognition
5.3. Differences in Regions
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Type of Variables | Description and Assignment | Maximum | Minimum | Mean | SD |
---|---|---|---|---|---|
Dependent variables | |||||
whether to adopt OSCF | 1 = Yes; 0 = No | 1 | 0 | 0.53 | 0.49 |
Core independent variables | |||||
Training (X1) | 1 = Yes; 0 = No | 1 | 0 | 0.45 | 0.49 |
Subsidy (X2) | 1 = Yes; 0 = No | 1 | 0 | 0.29 | 0.45 |
Mediate variables | |||||
Economic value (M1) | Do you think OSCF will increase vegetable income? Level 5:1 = strongly disagree, 5 = strongly agree | 5 | 1 | 3.25 | 1.07 |
Resource capacity (M2) | Do you think OSCF is good for resource capacity of vegetable plots? Level 5: 1 = strongly disagree, 5 = strongly agree | 5 | 1 | 3.03 | 1.18 |
Ecosystem impact (M3) | Do you think OSCF can improve agri-ecological environment? Level 5: 1 = strongly disagree, 5 = strongly agree | 5 | 1 | 3.11 | 0.99 |
Control variables | |||||
The head of the household characteristics | |||||
Age (C1) | ordinal | 83 | 27 | 52.02 | 8.58 |
Education (C2) | 1 = primary school and illiterate, 2 = junior school, 3 = high school, 4 = junior college and higher education | 4 | 1 | 2.00 | 0.65 |
Family characteristics | |||||
Cooperative (C3) | Whether to join the cooperative? 1 = Yes; 0 = No | 1 | 0 | 0.47 | 0.50 |
Labour force (C4) | ordinal | 6 | 0 | 2.87 | 1.00 |
Greenhouse vegetable area (C5) | Ha | 5.09 | 0.03 | 0.51 | 0.43 |
Characteristics of greenhouse vegetable plots (C6) | 1 = barren; 2 = in general; 3 = fertile | 3 | 1 | 2.53 | 0.54 |
Property rights (C7) | 1 = management right, 2 = Self-contracting rights | 1 | 0 | 0.49 | 0.50 |
Variables | Coef. | S.E | Marginal Effect |
---|---|---|---|
Training(X1) | 4.873 *** | (0.651) | 0.328 *** |
Subsidy(X2) | 5.465 *** | (0.807) | 0.368 *** |
Age(C1) | 0.036 | (0.027) | 0.002 |
Education(C2) | −0.351 | (0.384) | −0.024 |
Cooperative(C3) | 0.303 | (0.472) | 0.020 |
Labours(C4) | 1.207 ** | (0.570) | 0.081 ** |
Greenhouse vegetable area(C5) | −2.886 * | (1.478) | −0.194 ** |
Soil fertility(C6) | 0.816 ** | (0.413) | 0.055 ** |
Property rights(C7) | 1.576 *** | (0.474) | 0.106 *** |
Constants | −8.461 *** | (2.376) | |
N | 318 | 318 | |
Wald test | 90.71 *** | ||
pseudo R2 | 0.663 | 0.663 |
Variables | Logit | Logit | Logit | Reg | Logit | Reg | Logit | Reg | Logit |
---|---|---|---|---|---|---|---|---|---|
Y1 Model (1) | Y1 Model (2) | X,M,Y1 Model (3) | M1 Model (4) | Y1 Model (5) | M2 Model (6) | Y1 Model (7) | M3 Model (8) | Y1 Model (9) | |
Training | 4.056 *** | 4.873 *** | 4.736 *** | 0.918 *** | 4.648 *** | 0.952 *** | 4.242 *** | 1.038 *** | 4.222 *** |
(9.56) | (7.49) | (4.91) | (9.98) | (5.18) | (8.78) | (5.78) | (8.38) | (2.98) | |
Subsidy | 4.811 *** | 5.465 *** | 4.178 *** | 0.842 *** | 6.969 *** | 0.745 *** | 5.682 *** | 0.878 *** | 6.622 *** |
(6.18) | (6.77) | (4.69) | (8.15) | (3.38) | (6.92) | (6.28) | (6.67) | (5.58) | |
Economic value | 3.113 *** | 3.127 *** | |||||||
(3.37) | (4.22) | ||||||||
Ecosystem impact | 3.199 *** | 3.119 * | |||||||
(3.90) | (1.81) | ||||||||
Resource capacity | 2.221 *** | 1.477 ** | |||||||
(5.25) | (2.32) | ||||||||
Control variables | Uncontroled | Controlled | |||||||
Constants | −2.356 *** | −8.461 *** | −19.66 *** | 2.312 *** | −18.15 *** | 1.494 *** | −16.13 *** | 2.179 *** | −40.18 *** |
(−8.11) | (−3.56) | (−4.86) | (5.62) | (−3.25) | (3.18) | (−4.56) | (4.39) | (−3.56) | |
N | 318 | 318 | 318 | 318 | 318 | 318 | 318 | 318 | 318 |
R2 | 0.468 | 0.412 | 0.424 | ||||||
pseudo R2 | 0.616 | 0.663 | 0.830 | 0.857 | 0.796 | 0.943 |
Coef. | Compare Average Local Effects | |
---|---|---|
Training | ||
Total effects | 11.59 *** | 0.125 *** |
(5.66) | (5.29) | |
Direct effects | 4.222 *** | 0.0406 * |
(2.98) | (1.87) | |
Mediating effects | 7.372 ** | 0.0842 |
(2.31) | ||
Proportion of mediating effect (%) | 63.58 | |
Subsidy | ||
Total effects | 12.87 *** | 0.139 *** |
(4.70) | (5.38) | |
Direct effects | 6.622 *** | 0.0690 *** |
(5.58) | (2.97) | |
Mediating effects | 6.253 ** | 0.0698 |
(2.11) | ||
Proportion of mediating effect (%) | 48.57 |
Variables | Coef. | S.E | Proportion of Mediating Effect (%) |
---|---|---|---|
Training | |||
Economic value | 2.977 | 1.121 | 40.38 |
Resource capacity | 1.533 | 0.770 | 20.80 |
Ecosystem impact | 2.862 | 1.050 | 38.82 |
Subsidy | |||
Economic value | 2.329 | 0.914 | 37.25 |
Resource capacity | 1.297 | 0.663 | 20.75 |
Ecosystem impact | 2.627 | 0.981 | 42.00 |
Region | Adoption Ratio (%) | Percentage of Farmers Receiving Subsidies (%) | Price of Organic Fertilizer (yuan/t) | Method of Getting Organic Fertilizer (1 = Commercial Organic Fertilizer, 2 = Compost) | |
---|---|---|---|---|---|
Non-policy county | Yucheng | 29.5 | 0 | 2500 | 1 |
Qingzhou | 39.2 | 0 | 440 | 2 | |
Policy county | Pingyuan | 51.1 | 50 | 2000 | 1 |
Anqiu | 86.7 | 77.7 | 200 | 2 |
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Yi, X.; Zou, Q.; Zhang, Z.; Chang, S.-H.-E. What Motivates Greenhouse Vegetable Farmers to Adapt Organic-Substitute-Chemical-Fertilizer (OSCF)? An Empirical Study from Shandong, China. Int. J. Environ. Res. Public Health 2023, 20, 1146. https://doi.org/10.3390/ijerph20021146
Yi X, Zou Q, Zhang Z, Chang S-H-E. What Motivates Greenhouse Vegetable Farmers to Adapt Organic-Substitute-Chemical-Fertilizer (OSCF)? An Empirical Study from Shandong, China. International Journal of Environmental Research and Public Health. 2023; 20(2):1146. https://doi.org/10.3390/ijerph20021146
Chicago/Turabian StyleYi, Xiaoyan, Qinqi Zou, Zewei Zhang, and Sheng-Han-Erin Chang. 2023. "What Motivates Greenhouse Vegetable Farmers to Adapt Organic-Substitute-Chemical-Fertilizer (OSCF)? An Empirical Study from Shandong, China" International Journal of Environmental Research and Public Health 20, no. 2: 1146. https://doi.org/10.3390/ijerph20021146
APA StyleYi, X., Zou, Q., Zhang, Z., & Chang, S.-H.-E. (2023). What Motivates Greenhouse Vegetable Farmers to Adapt Organic-Substitute-Chemical-Fertilizer (OSCF)? An Empirical Study from Shandong, China. International Journal of Environmental Research and Public Health, 20(2), 1146. https://doi.org/10.3390/ijerph20021146