Journal of Resources and Ecology ›› 2019, Vol. 10 ›› Issue (3): 265-274.DOI: 10.5814/j.issn.1674-764X.2019.03.004
Special Issue: 中国耕地资源与粮食安全
• Cultivated Land Resources and Land Use • Previous Articles Next Articles
LI Zijun(), YU Yuanhe, JIANG Aixia*(
)
Received:
2018-11-02
Accepted:
2019-02-18
Online:
2019-05-30
Published:
2019-05-30
Contact:
JIANG Aixia
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*First author:
Supported by:
LI Zijun,YU Yuanhe,JIANG Aixia. Temporal Variations and Driving Factors of Cultivated Land Use Intensity in Shandong Province from 1980 to 2015[J]. Journal of Resources and Ecology, 2019, 10(3): 265-274.
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Capital input type | Annual change during 1980-2015 (Yuan yr-1) | Annual change during 1980-1995 (Yuan yr-1) | Annual change during 1996-2015 (Yuan yr-1) | Average annual changing rate (%) |
---|---|---|---|---|
Seed cost | 3.41 | 4.29 | 3.11 | 2.97 |
Farmyard manure cost | -3.53 | -5.20 | -1.10 | -3.83 |
Fertilizer cost | 7.14 | 8.25 | 2.10 | 2.84 |
Pesticide cost | 1.54 | 5.76 | -0.25 | 2.70 |
Machinery cost | 7.14 | 1.51 | 10.71 | 8.03 |
Drainage and irrigation cost | 2.10 | 1.53 | 2.22 | 5.09 |
Table 1 Annual change and average annual changing rates of capital inputs for the main crops in Shandong Province from 1980 to 2015
Capital input type | Annual change during 1980-2015 (Yuan yr-1) | Annual change during 1980-1995 (Yuan yr-1) | Annual change during 1996-2015 (Yuan yr-1) | Average annual changing rate (%) |
---|---|---|---|---|
Seed cost | 3.41 | 4.29 | 3.11 | 2.97 |
Farmyard manure cost | -3.53 | -5.20 | -1.10 | -3.83 |
Fertilizer cost | 7.14 | 8.25 | 2.10 | 2.84 |
Pesticide cost | 1.54 | 5.76 | -0.25 | 2.70 |
Machinery cost | 7.14 | 1.51 | 10.71 | 8.03 |
Drainage and irrigation cost | 2.10 | 1.53 | 2.22 | 5.09 |
Period | Correlation coefficients (Rg) between the net income per unit cost of grain crops (Pg) and the average annual intensity (Ig) | Correlation coefficients (Re) between the net income per unit cost of economic crops (Pe) and the average annual intensity (Ie) | ||||||
---|---|---|---|---|---|---|---|---|
Ig and Pg at the same time | Ig lag Pg for one year | Ig lag Pg for two years | Ig lag Pg for three years | Ie and Pe at the same time | Ie lag Pe for one year | Ie lag Pe for two years | Ie lag Pe for three years | |
1980-1988 | 0.63 | 0.75 | 0.81 | 0.78 | -0.04 | 0.21 | -0.09 | -0.08 |
1989-1997 | 0.45 | 0.58 | 0.74 | 0.52 | 0.32 | 0.54 | 0.71 | 0.37 |
1998-2006 | 0.65 | 0.88 | 0.79 | 0.74 | 0.57 | 0.73 | 0.96 | 0.78 |
2007-2015 | -0.31 | -0.14 | -0.25 | -0.04 | -0.49 | -0.26 | -0.11 | 0.15 |
Table 2 Correlation coefficients between the average net incomes from tax reduction per unit cost and the average annual intensities of four major crops in Shandong Province from 1980 to 2015
Period | Correlation coefficients (Rg) between the net income per unit cost of grain crops (Pg) and the average annual intensity (Ig) | Correlation coefficients (Re) between the net income per unit cost of economic crops (Pe) and the average annual intensity (Ie) | ||||||
---|---|---|---|---|---|---|---|---|
Ig and Pg at the same time | Ig lag Pg for one year | Ig lag Pg for two years | Ig lag Pg for three years | Ie and Pe at the same time | Ie lag Pe for one year | Ie lag Pe for two years | Ie lag Pe for three years | |
1980-1988 | 0.63 | 0.75 | 0.81 | 0.78 | -0.04 | 0.21 | -0.09 | -0.08 |
1989-1997 | 0.45 | 0.58 | 0.74 | 0.52 | 0.32 | 0.54 | 0.71 | 0.37 |
1998-2006 | 0.65 | 0.88 | 0.79 | 0.74 | 0.57 | 0.73 | 0.96 | 0.78 |
2007-2015 | -0.31 | -0.14 | -0.25 | -0.04 | -0.49 | -0.26 | -0.11 | 0.15 |
Fig. 7 Variations of annual cultivated land area per capita and average annual intensity for the four major crops in Shandong Province from 1980 to 2015
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