Characteristics of Soil Phosphorus in Winter Wheat/Summer Maize Cropping in Shaanxi Guanzhong Plain
LIU Lin, JI BingJie, LI RuoNan, BATBAYAR Javkhlan, ZHANG ShuLan, YANG XueYun,College of Natural Resources and Environment, Northwest A&F University/Key Laboratory of Plant Nutrition and the Agro-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling 712100, Shaanxi
Abstract 【Objective】 It is of great significance to maintain and improve soil quality and land productivity, meanwhile enhance the phosphorus (P) use efficiency by studying the distribution characteristics and changes of soil phosphorus in winter wheat/summer maize cropping in Shaanxi Guanzhong Plain in recent 30 years. 【Method】 Based on 458 soil samples collected in total in 2011 from 10 typical counties in winter wheat/summer maize cropping in Guanzhong Plain analysis data, we compared its Olsen P content with the soil survey data in 1980s, and also explored the distribution characteristics of the current soil phosphorus pools at the regional level.【Result】 The results showed that the soil Olsen P content in the plough layer soils significantly increased during the past 30 years. The mean values of soil Olsen P in Baoji, Xianyang and Weinan were 26.09 mg·kg -1, 27.50 mg·kg -1 and 21.53 mg·kg -1, respectively, compared with soil survey data in 1980s, the corresponding increasing rate were 334.83%, 276.71% and 231.23%, respectively. The proportions of cultivated land with higher soil Olsen P levels were significantly increased, with the largest increase was observed in 15-30 mg·kg -1 and the largest decrease in Olsen P<10 mg·kg -1. The total distribution of soil Olsen P and inorganic phosphorus was higher in the west (Baoji City) and the middle (Xianyang City) than in the east (Weinan City), and organic phosphorus content was opposite. At present, the soil Olsen P level in the large area of Guanzhong Plain under winter wheat/summer maize cropping was higher than the agronomic threshold, which could meet the supply of phosphorus in high yield crops. Meanwhile, the cumulative distribution probability of soil Olsen P content (greater than 37 mg·kg -1) was more than 20% in Baoji and Xianyang, the cumulative distribution probability of water-soluble P content (greater than 2 mg·kg -1) was more than 22%, so there would be a higher risk of water environment pollution. 【Conclusion】 Excessive application of phosphorus fertilizer under long-term intensive and high-intensity planting conditions significantly increased the Olsen P content in soil. Considering the protection of environment and rational utilization of limited phosphorus resources, the application of phosphorus fertilizer should be regulated reasonably, so as to apply fertilizer according to soil and supply fertilizer according to demand. Keywords:soil Olsen P;winter wheat/summer maize system;total-organic P;total-inorganic P;soil organic matter
PDF (694KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 刘琳, 吉冰洁, 李若楠, BATBAYARJavkhlan, 张树兰, 杨学云. 陕西关中冬小麦/夏玉米区土壤磷素特征[J]. 中国农业科学, 2019, 52(21): 3878-3889 doi:10.3864/j.issn.0578-1752.2019.21.016 LIU Lin, JI BingJie, LI RuoNan, BATBAYAR Javkhlan, ZHANG ShuLan, YANG XueYun. Characteristics of Soil Phosphorus in Winter Wheat/Summer Maize Cropping in Shaanxi Guanzhong Plain[J]. Scientia Agricultura Sinica, 2019, 52(21): 3878-3889 doi:10.3864/j.issn.0578-1752.2019.21.016
Table 2 表2 表2陕西关中地区1980年和2011年耕层土壤各等级有效磷含量面积比例及平均值 Table 2Mean value of Olsen P and proportion of different Olsen P level in surface soil in 1980 and 2011 in Shaanxi Guanzhong Plain
取样地点 Sampling site
1980年耕层土壤各等级有效磷含量面积比例 Proportion of Olsen-P level in surface soil in 1980 (%)
有效磷含 量平均值 Mean of Olsen-P (mg·kg-1)
2011年耕层土壤各等级有效磷含量面积比例 Proportion of Olsen-P level in surface soil in 2011 (%)
Table 3 表3 表3陕西关中各县市小麦/玉米区耕层土壤全磷、有机磷、无机磷和有效磷含量及其占土壤全磷的比例 Table 3Soil total P (TP), organic P (OP), inorganic P (IP) and Olsen P contents in surface soil and the its proportions in TP in wheat/maize cropping in Shaanxi Guanzhong Plain
取样地点 Sampling site
全磷含量 Total P (g·kg-1)
有机磷含量 Total-organic P (mg·kg-1)
有机磷/全磷 (Total-organic P/Total P) (%)
无机磷含量 Total- inorganic P (mg·kg-1)
无机磷/全磷 (Total-inorganic P/Total P) (%)
有效磷含量 Olsen P (mg·kg-1)
有效磷/全磷 (PAC) (%)
宝鸡市Baoji
1.10
145.95
13.27
901.26
81.93
26.09
2.37
陈仓区Chencang
1.05±0.17
203.00±116.9
19.32
847.96±197.97
80.68
21.53±9.63
2.05
岐山县Qishan
1.19±0.19
232.20±155.02
19.48
960.04±223.48
80.52
26.54±10.10
2.23
扶风县Fufeng
1.17±0.25
108.54±99.52
9.25
1065.34±255.48
90.75
27.42±11.73
2.34
咸阳市Xianyang
1.08
155.39
14.39
899.45
83.28
27.50
2.55
兴平县Xingping
1.15±0.21
172.48±115.28
14.97
979.55±216.54
85.03
28.51±14.63
2.48
三原县Sanyuan
0.98±0.16
166.56±125.93
17.08
808.36±199.83
82.92
21.20±11.31
2.16
泾阳县Jingyang
1.09±0.18
186.63±129.61
17.07
906.97±208.66
82.93
26.19±13.39
2.40
武功县Wugong
1.20±0.21
177.72±114.73
14.87
1017.36±179.73
85.13
35.74±17.25
2.98
渭南市Weinan
0.95
237.75
25.03
711.52
75.00
21.53
2.27
临渭区Linwei
0.91±0.17
266.20±120.66
29.15
646.93±196.70
70.85
17.70±7.00
1.95
蒲城县Pucheng
0.92±0.15
232.87±80.54
25.22
690.41±153.68
74.78
21.89±11.64
2.38
富平县Fuping
0.96±0.18
263.76±106.22
27.49
695.86±184.71
72.51
24.44±12.24
2.55
The data of total P, total-organic P, total-inorganic P and Olsen P content in the table were Mean±SD 表中全磷、有机磷、无机磷和有效磷含量数据为平均值±标准差
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