洛神葵肥料三要素適量試驗

Abstract

(1)不同肥料三要素施用量間對洛神葵萼片產量與結果數及植株生長之關係，N較有顯著效果，P2O5及K2O無明顯友現，且K2O對採高效應有顯著不利影響。 (2)肥料用量對洛神葵產量之效應，就各要素不同施用量以觀，N每株施30g P2O5 K2O各10g為最高。如以每增拖一公斤所得增產值而討，則N每株施加20g K2O 10g為最高• (3)不同肥料用量對植株生長影響，抽採結果數及各部發育均隨N施用量增加而提高，並達差異顯著水準P2O5對植株生長無明頗差異。K2O施用少量時對植株生長略有提高，但未達差異水準，如多量拖用（20g/株）時，植株各部生長反而降低，尤其株高一項降低在統計上達顯著標準。 (4)不同肥料處理組合對洛神葵雩片產量的效應，肥料三要素不同配合啦理間以20-10-10興30-20-10、30-10-20、及30-20-20等四個組合之萼片產量及結果數最高；如就經濟施肥效率而言，則以N 20g、P2O5 10g、K2O 10g為最適合。 1. The analysis of variance on sepal yield and growth characters of Rozelle indicated that N has significant response among the three fertilizer elements to sepal yield and fruit setting number as well as plant growth. However, P2O5 and K2O did not show significant effects, but K2O showed undesirable effects on the plant height. 2. Responses of fertilizer application rates on the yield of Rozelle: In case of various fertilizer application rates showed that the highest yield was obtained when N 30g, P2O5 10g and K2O log was applied per plant. By increasing 1 Kg of fertilizer, the highest was N 20g, P2O5 20g and K2O 10g. 3. The effects of various fertilizer application rates on the plant growth: The fruit setting number and plant growth were promoted when N level was increased, the effects were significant difference. In case of P2O5, it did not show significant level. On the other hand, K2O showed some promotion on the plant growth when small amounts was applied, but it did not reach significant level. If large amounts (20g/plant) was applied, the plant growth decreased, particularly the plant height decreased obviously and it reached significant level. 4. Responses of various fertilizer treatments to sepal yield: Various fertilizer treatments indicated that 20-10-10, 30-20-10, 30-10-20 and 30-20-20 showed highest sepal yield and fruit setting number. However, in view of economic fertilizer efficiency, N 20g, P2O5 10g and K2O 10g was the best.