Resources Science ›› 2017, Vol. 39 ›› Issue (6): 1127-1136.doi: 10.18402/resci.2017.06.12
• Orginal Article • Previous Articles Next Articles
Weiyong YU1(), Yanbin QI1(
), Feng WEI1, Xin DENG2
Received:
2016-10-18
Revised:
2017-03-06
Online:
2017-06-20
Published:
2017-06-20
Weiyong YU, Yanbin QI, Feng WEI, Xin DENG. The impact of FDD rotation mode and irrigation methods on rice irrigation water efficiency in Southwestern China[J].Resources Science, 2017, 39(6): 1127-1136.
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Table 3
Sample farmers' rice irrigation water efficiency value(户,%)"
效率值 | 总效率 | 纯技术效率 | 规模效率 | ||||||
---|---|---|---|---|---|---|---|---|---|
样本数 | 比重 | 累计比重 | 样本数 | 比重 | 累计比重 | 样本数 | 比重 | 累计比重 | |
0~0.200 0 | 718 | 90.09 | 90.09 | 370 | 46.42 | 46.42 | 51 | 6.40 | 6.40 |
0.200 0~0.400 0 | 49 | 6.15 | 96.24 | 304 | 38.14 | 84.56 | 208 | 26.10 | 32.50 |
0.400 0~0.600 0 | 8 | 1.00 | 97.24 | 46 | 5.77 | 90.33 | 259 | 32.50 | 65.00 |
0.600 0~0.800 0 | 5 | 0.63 | 97.87 | 35 | 4.39 | 94.72 | 130 | 16.31 | 81.31 |
0.800 0~0.900 0 | 4 | 0.50 | 98.37 | 14 | 1.76 | 96.48 | 110 | 13.80 | 95.11 |
1.000 0 | 13 | 1.63 | 100.00 | 28 | 3.51 | 100.00 | 39 | 4.89 | 100.00 |
mean | 0.137 8 | 0.2745 | 0.549 8 |
Table 6
Description statistics of factors affecting the efficiency of irrigation water"
变量类型 | 变量符号 | 变量名称 | 定义/单位 | 均值 | 标准差 |
---|---|---|---|---|---|
被解释变量 | CRS | 总效率 | 1 | 0.14 | 0.19 |
检验变量 | FDD_rotation | 水旱轮作模式 | 1=水稻-小麦;2=水稻-蔬菜;3=水稻-油菜;4=水稻-药材 | 2.61 | 0.93 |
irrigation_model | 灌溉方式 | 1=井水灌溉;2=提水灌溉;3=引水灌溉;4=蓄水灌溉 | 2.67 | 0.53 | |
控制变量 | species_selection | 品种类型 | 1=常规稻;2=杂交稻 | 1.95 | 0.24 |
commer_rate | 商品化率 | 稻谷销售量/收获量/% | 27.19 | 53.50 | |
cultivated_way | 耕地方式 | 1=旋耕;2=翻耕;3=少免耕 | 1.49 | 0.66 | |
age | 户主年龄 | 岁 | 56.01 | 10.30 | |
education | 受教育程度 | 1=小学以下;2=小学;3=初中;4=高中/中专;5=大学/大专;6=大学以上 | 2.22 | 0.80 | |
village_cadres | 是否为村干部 | 1=是;2=否 | 1.94 | 0.24 | |
regional_feature | 地域特征 | 1=平原区;2=丘陵山地区 | 1.38 | 0.49 | |
income | 家庭收入 | 元/年 | 38 151.73 | 35 644.31 | |
工具变量 | per_cost | 单位灌溉成本 | 元/hm2 | 165 773.54 | 428 615.32 |
Table 7
The empirical regression results of factors affecting the efficiency of irrigation water"
指标 | 模型Ⅰ | 模型Ⅱ | 模型Ⅲ | 模型Ⅳ | 模型Ⅴ |
---|---|---|---|---|---|
OLS估计 | 断尾回归估计 | Tobit估计 | Tobit估计 | IV Tobit估计 | |
FDD_rotation | -0.011 8***(-2.74) | -0.054 0* (-1.75) | -0.012 0***(-2.75) | -0.012 5***(-2.84) | -0.013 5***(-2.93) |
irrigation_ model | 0.029 8*** (2.99) | -0.236 9* (-1.81) | 0.030 0*** (3.59) | 0.031 0*** (3.64) | 0.051 4*** (2.81) |
species_selection | -0.002 8 (-0.12) | -0.351 8* (-1.73) | -0.002 4 (-0.11) | 0.001 3 (0.06) | -0.003 3 (-0.14) |
commer_rate | -0.010 1 (-1.02) | -0.212 0 (-1.31) | -0.010 2 (-1.51) | -0.007 7 (-1.16) | -0.009 7 (-0.92) |
age | -0.000 3 (-0.55) | -0.019 3***(-2.94) | -0.000 3 (-0.67) | -0.000 5 (-1.01) | -0.000 6 (-0.99) |
education | -0.004 9 (-0.67) | -0.108 1* (-1.94) | -0.005 0 (0.66) | -0.004 4 (-0.58) | -0.008 1 (-1.00) |
village_cadres | 0.144 5 (0.66) | -0.484 3** (-2.39) | 0.014 2 (0.70) | 0.018 0 (0.88) | 0.017 7 (0.77) |
cultivated_way | -0.009 4 (-1.44) | -0.146 8* (-1.92) | -0.009 7 (-1.33) | -0.011 3 (-1.54) | -0.000 8 (-0.07) |
per_cost | 0.000 0 (1.45) | -0.000 1* (-1.66) | 0.000 0 (0.94) | 0.000 0 (1.10) | 0.000 2* (1.61) |
regional_feature | -0.023 1** (-2.09) | -0.237 4** (-2.37) | -0.023 5** (-2.25) | ||
labor | -0.006 4 (-1.44) | -0.004 2 (-0.13) | -0.006 5* (-1.74) | ||
ln(income) | 0.012 7* (1.89) | 0.066 7 (0.96) | 0.012 9** (2.07) | ||
Subsidies | 0.000 0 (0.98) | 0.000 6** (2.25) | 0.000 0 (0.94) | ||
C | 0.053 2 (0.48) | 4.025 8*** (2.94) | 0.053 8 (0.59) | 0.132 1** (2.31) | 0.089 5 (1.02) |
R2 | 0.045 4 | 0.079 5 | 0.068 4 | 0.112 8 | 0.120 2 |
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