Soil nitrogen accumulation by hairy vetch [Vicia villosa] and red clover [Trifolium incarnatum]
2008
Zheng, S.H.(Saga Univ., Karatsu (Japan). Coastal Bioenvironment Center) | Nakamoto, H. | Arima, S.
The objective of this study is to improve the soil fertility in Uwaba area by cultivating the manure crop, such as crimson clover (Trifolium incarnatum L.) and hairy vetch (Vicia villosa Roth.). Two crops were sown on November 4, 2006, and were incorporated on May 29, 2007. The soil fertility was evaluated by sowing corn plants after the incorporation of manure crops. The dry matter production was higher in crimson clover (cv.1068g/square m ) than in hairy vetch (cv.703g/square m). The nitrogen accumulation by the incorporation of crimson clover and hairy vetch was estimated by 18.5g/square m and 12.5g/ square m respectively, based on their nitrogen contents. Furthermore, the nitrogen assimilated by corn plants was 9.0 g/square m and 9.3g/square m by the incorporation of crimson clover and hairy vetch, respectively, compared with 3.1g in control.
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