We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Soil organic C, nutrients, microbial biomass, and grain yield of rice ( Oryza sativa L.) after 18 years of fertilizer application to an infertile paddy soil.
- Authors
Lv, Meirong; Li, Zhongpei; Che, Yuping; Han, F.; Liu, Ming
- Abstract
We have studied the influence of long-term fertilization on organic C, nutrients, microbial biomass of soil, and grain yield of rice ( Oryza sativa L.) after 18 years of inorganic and organic fertilizer application to an infertile paddy field under subtropical conditions. After 18 years of fertilization, soil organic C and total N contents were 9.56~12.17 and 1.01~1.25 g kg, which were 190~269% and 135~191% higher than those of the initial soil, respectively. Organic manure application increased soil organic C, total N, available N, and available P contents by 19.2%, 14.4%, 13.2%, and 78.3% on average compared with organic manure-omitted treatments. Phosphorus fertilizer application increased soil available P content more significantly than organic manure application, and it was an average 385% higher than P-omitted treatments. Soil microbial biomass C, N, and rice yield were 48.9%, 33.2%, and 133% higher in organic manure application treatments and 36.8%, 38.8%, and 239% higher in P fertilizer application treatments than organic manure-omitted or P-omitted treatments, respectively. Incorporation of organic manure-enhanced and P fertilizer-enhanced rice yields by 382% compared with the unfertilized treatment and yield increment index was 123% compared with that observed during 1991-1994, implying that organic manure application combined with P fertilizer was needed to ensure high and sustainable productivity. Rice yield was significantly correlated with all soil chemical properties except available K content, and stepwise regression analysis showed that soil available P content was the limiting factor to rice yield.
- Subjects
BIOMASS; RICE; FERTILIZERS; ORGANIC fertilizers; MANURES
- Publication
Biology & Fertility of Soils, 2011, Vol 47, Issue 7, p777
- ISSN
0178-2762
- Publication type
Article
- DOI
10.1007/s00374-011-0584-y