Liao Y.,Soil and Fertilizer Institute of Hunan Province |
Liao Y.,Station for Reddish Paddy Soil Co Environment in Wangcheng |
Liao Y.,Hunan Agricultural University |
Zheng S.,Soil and Fertilizer Institute of Hunan Province |
And 11 more authors.
Frontiers of Agriculture in China | Year: 2010
A 27 years field experiment was conducted on a Fe-Accumli Stagnic Anthrosol to evaluate the effects of long-term application of fertilizer, pig manure (PM), and rice straw (RS) on rice yield, uptake, and usage efficiency of potassium, soil K pools, and the nonexchangeable K release under the double rice cropping system in South Central China. Common cropping pattern in the study was early rice-late rice-fallow (winter). The field treatments included CK (no fertilizer applied), NP, NK, NPK, and NK + PM, NP + RS, NPK + RS. The pig manure and rice straw was applied in both the early rice and late rice cropping season. The ranking order of 27 years average annual grain yield were the CK