Description
[Introduction] This study was conducted to determine the effect of the cutting frequency and K application rate on the dry matter yield (DMY) and nutritive value of new alfalfa varieties in Korea.
[Material and Methods] The sowing date and rate were September 21, 2019, and 20 kg/ha, respectively. The treatment was by the split-split plot design, and the main plot was the Fall dormancy (FD) of 3 (Rugged Rancher), 4 (SW4113), and 9 (SW9720), the sub-plot was excess 40 day (LCF), from 31 to 40 days (MCF), and under 30 day (HCF) times of cutting frequency (CF), and the sub-sub plot was 150 (K 150), 300 (K 300), and 450 (K 450) kg/ha of K application rate. The first harvest reached 10% of the flowering, and after the first harvest, it was conducted according to the cutting frequency treatment. The survey contents were investigated as DMY, Crude protein (CP), Neutral detergent fiber (NDF), Acid detergent fiber (ADF), and K content.
[Results and Discussion] K 450 of DMY was significantly higher than K 150 (p < 0.05). The CF was not significant at each level (p > 0.05). FD 3 and FD 4 of DMY were significantly higher than FD 9 (p < 0.05). The CP, NDF, and ADF according to FD and CF were significantly different at each treatment (p < 0.05). The CP and ADF according to the K treatment were significantly higher at K 150 than K 300 and K 450 (p < 0.05). In addition, the NDF according to the K treatment was significantly higher in K 150 and K 450 than K 300 (p < 0.05). The K content of alfalfa significantly differed according to the K treatment (p < 0.05). Therefore, it is judged that a high DMY can be expected when the K application rate, cutting frequency, and FD is 450 kg/ha, HCF, and 4, respectively.
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Effects of Fall Dormancy, Cutting Frequency, and K Application Rate on Dry Matter Yield and Nutritive Value of Alfalfa
[Introduction] This study was conducted to determine the effect of the cutting frequency and K application rate on the dry matter yield (DMY) and nutritive value of new alfalfa varieties in Korea.
[Material and Methods] The sowing date and rate were September 21, 2019, and 20 kg/ha, respectively. The treatment was by the split-split plot design, and the main plot was the Fall dormancy (FD) of 3 (Rugged Rancher), 4 (SW4113), and 9 (SW9720), the sub-plot was excess 40 day (LCF), from 31 to 40 days (MCF), and under 30 day (HCF) times of cutting frequency (CF), and the sub-sub plot was 150 (K 150), 300 (K 300), and 450 (K 450) kg/ha of K application rate. The first harvest reached 10% of the flowering, and after the first harvest, it was conducted according to the cutting frequency treatment. The survey contents were investigated as DMY, Crude protein (CP), Neutral detergent fiber (NDF), Acid detergent fiber (ADF), and K content.
[Results and Discussion] K 450 of DMY was significantly higher than K 150 (p < 0.05). The CF was not significant at each level (p > 0.05). FD 3 and FD 4 of DMY were significantly higher than FD 9 (p < 0.05). The CP, NDF, and ADF according to FD and CF were significantly different at each treatment (p < 0.05). The CP and ADF according to the K treatment were significantly higher at K 150 than K 300 and K 450 (p < 0.05). In addition, the NDF according to the K treatment was significantly higher in K 150 and K 450 than K 300 (p < 0.05). The K content of alfalfa significantly differed according to the K treatment (p < 0.05). Therefore, it is judged that a high DMY can be expected when the K application rate, cutting frequency, and FD is 450 kg/ha, HCF, and 4, respectively.
