Abstract
Green manure crops can be used as alternatives to mineral fertilizers because they improve soil structure and nutrient content of soil. Here, we evaluated the effect of partial replacement of mineral nitrogen (N) fertilizer with rapeseed residue green manure on soil properties and rice productivity in a rice-rapeseed double-cropping system. The treatments were comprised of four levels of mineral N fertilizer and recommended levels of phosphate and potash fertilizers. Rice clum and panicle length did not differ between treatments. However, the proportion of ripened grains and 1,000-grain weight of rice plants were greater under rapeseed residue amendments than those under 100% conventional mineral N fertilizer treatments. Paddy soils treated with rapeseed residues had greater soil organic matter and exchangeable cations than those treated with mineral N fertilizer alone. Thus, rapeseed residues applied as green manure can serve as alternative N sources in sustainable rice-rapeseed double-cropping systems.
| Original language | English |
|---|---|
| Pages (from-to) | 751-764 |
| Number of pages | 14 |
| Journal | Communications in Soil Science and Plant Analysis |
| Volume | 45 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2014 Mar |
| Externally published | Yes |
Bibliographical note
Funding Information:This research was supported by a National Research Foundation of Korea Grant funded by the Korean Government (2012R1A1B3001409) and by the Cooperative Research Program for Agricultural Sciences and Technology Development (PJ9070882012) of the Rural Development Administration in Korea. Instrumental analysis was partly supported by the Korea Basic Science Institute, the Institute of Environmental Research, and Central Laboratory of Kangwon National University in Korea.
Keywords
- Biodiesel
- green manure
- nitrogen
- rapeseed
- rice
ASJC Scopus subject areas
- Agronomy and Crop Science
- Soil Science
