Site
|
Planting
years
|
Rotation
|
Treatment
|
Total K balance
|
Soil available K
|
Clay mineralogy
(cg value)
|
Reference
|
Chongqing |
1991-2000 |
Rice-wheat |
-K |
-1686.6 |
56.0 |
– |
(Xiong
et al., 2003) |
|
|
|
+K |
-712.9 |
84.2 |
– |
|
|
|
|
+K+S |
-12.2 |
88.1 |
– |
|
Henan |
1989-2005 |
Maize-wheat |
-K |
-2352 |
59 |
– |
(Sun et al.,
2009) |
|
|
|
+K |
513 |
275 |
– |
|
|
|
|
+K+S |
636 |
234 |
– |
|
Hubei |
2014-2017 |
Rice-rape |
-K |
-780 |
51.4 |
1.12 |
(Zhu et al.,
2019) |
|
|
|
+K |
-894 |
62.8 |
1.11 |
|
|
|
|
+K+S |
29 |
79.0 |
1.12 |
|
Hunan |
1981-2012 |
Rice-rice |
-K |
-3308 |
95 |
1.17 |
(Liao et al.,
2017) |
|
|
|
+K |
-607 |
159 |
1.15 |
|
|
|
|
+K+S |
287 |
220 |
1.14 |
|