长期施肥下干旱区灰漠土磷的平衡与活化特征

长期施肥下干旱区灰漠土磷的平衡与活化特征

王西和, 刘骅, 冯固, 杨金钰, 王彦平, 黄建

Balance and Activation of AP in Dry Area Grey Desert Soil under Long-term Fertilization

WANG Xihe, LIU Hua, FENG Gu, YANG Jinyu, WANG Yanping, HUANG Jian

表1 试验处理及施肥量

Table 1 The design of treatment and quantity of fertilization (kg/hm²)

处理 Treatment	1990-1994			After 1994
处理 Treatment	N	P₂O₅	K₂O	N	P₂O₅	K₂O
CK	0	0	0	0	0	0
NK	99.4	0	23.1	241.5	0	61.9
NP	99.4	66.9	0	241.5	138	0
PK	0	66.9	23.1	0	138	61.9
NPK	99.4	66.9	23.1	241.5	138	61.9
NPKS	89.4+46.8^a	56.1+6.7^a	20.8+92.7^a	216.7+46.8^a	116.6+6.7^a	52+92.7^a
NPKM	29.8+240^a	20+69^a	8.3+90^a	84.9+240^a	51.4+69^a	12.4+90^a
1.5NPKM	59.6+480^a	40+138^a	16.5+180^a	151.8+480^a	90.4+138^a	19+180^a