The influence of permanent grasses on winter wheat productivity in organic and sustainable farming systems
2008
Repsiene, R., Lithuanian Inst. of Agriculture, Vezaiciai, Klaipeda reg. (Lithuania). Vezaiciai Branch | Skuodiene, R., Lithuanian Inst. of Agriculture, Vezaiciai, Klaipeda reg. (Lithuania). Vezaiciai Branch
The trial was conducted in light loamy Dystric Albeluvisol in Western Lithuania. The influence of mixture (80 % Trifolium pratense L. (Tp) cv. Liepsna + 20 % Phleum pratense L. (Pp) cv. Gintaras II) as green manure on the productivity of wheat was investigated in the organic farming system. No pesticides and mineral fertilisers were used in cattle manure 60 t ha-1 was applied only. Red clover aftermath was used as green manure. Mineral fertilisers and pesticides according to plant needs and 60 t haE-1 of cattle manure were applied in the sustainable farming system. Perennial grasses were grown for hay. Independently of the farming system red clover content in sward during the trial execution was 98.0-99.4 %. The dry mater (DM) yield of red clover regrowth was low (1.17-1.24 t haE-1), because of the lack of precipitation. Higher winter wheat yield (6.72 t haE-1) was obtained from the sustainable farming system. Maintenance with nutrients was better in sustainable than in the organic farming system, where the wheat yield was 1.8 times lower. Less nitrogen and phosphorus (2.8 and 2.6 times respectively) were applied to soil with green manure in the organic farming system when compared with the sustainable farming system.
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