陕西关中冬小麦/夏玉米区土壤磷素特征

刘琳,吉冰洁,李若楠,BATBAYARJavkhlan,张树兰,杨学云

Characteristics of Soil Phosphorus in Winter Wheat/Summer Maize Cropping in Shaanxi Guanzhong Plain

Lin LIU,BingJie JI,RuoNan LI,Javkhlan BATBAYAR,ShuLan ZHANG,XueYun YANG

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 2 Mean 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 (%)					有效磷含量平均值 Mean of Olsen-P (mg·kg^-1)
取样地点 Sampling site	＞40	30-40	15-30 (mg·kg^-1)	10-15	＜10	有效磷含量平均值 Mean of Olsen-P (mg·kg^-1)	＞40	30-40	15-30 (mg·kg^-1)	10-15	＜10	有效磷含量平均值 Mean of Olsen-P (mg·kg^-1)
宝鸡市 Baoji	0.07	0.09	4.83	9.15	85.85	6.00	15.00	18.00	55.00	10.00	2.00	26.09
陈仓区Chencang	-	-	4.18	9.23	86.59	5.80	7.14	14.29	64.29	14.29	-	21.53
岐山县Qishan	-	-	0.70	1.38	97.92	3.10	16.67	22.22	52.78	8.33	-	26.54
扶风县Fufeng	-	-	5.43	8.84	85.73	6.10	17.19	15.63	53.13	9.38	4.69	27.42
咸阳市Xianyang	0.27	0.66	6.00	9.87	83.20	7.30	17.00	19.00	46.00	16.00	3.00	27.50
兴平县Xingping	1.62	5.57	25.99	23.20	43.62	13.10	18.87	18.87	50.94	9.43	1.89	28.51
三原县Sanyuan	-	-	2.49	10.09	87.42	5.60	5.36	12.50	51.79	23.21	7.14	21.20
泾阳县Jingyang	-	0.61	6.07	14.17	79.15	7.90	16.13	19.35	51.61	9.68	3.23	26.19
武功县Wugong	-	-	13.05	18.33	68.62	9.60	28.3	24.53	30.19	16.98	-	35.74
渭南市Weinan	0.12	0.51	5.73	13.13	80.52	6.50	7.00	13.00	57.00	18.00	5.97	21.53
临渭区Linwei	0.20	2.20	13.90	39.70	44.00	6.80	-	4.35	63.04	23.91	8.70	17.70
蒲城县Pucheng	0.13	0.19	5.08	12.06	82.54	7.00	9.09	15.15	54.55	9.09	12.12	21.89
富平县Fuping	-	0.10	4.10	8.50	87.30	6.00	10.91	18.18	52.73	18.18	-	24.44