This research was conducted to study the effect of fertilizer types and photoperiod on the nutrient content of regrowth I on alfalfa (Medicago sativa L.). The variables measured were nutrient content i.e dry matter (DM), organic matter (OM), crude protein (CP), and crude fat (CF). The research applied statistical analysis Completely Randomized Design (CRD) factorial pattern 5x3 and t-test. If it resulted in a significant effect, it was continued with Duncan’s multiple range test (DMRT). The first factor was types of fertilizer consisted of P0=control, P1=green fertilizer and dolomite, P2=manure, green fertilizer and dolomite, P3=dolomite, and P4=green fertilizer® and dolomite. The second factor was the photoperiod consisted of C0=12 h, C1=16 h, and C3=20 h. The results showed that the fertilizer types treatments were significantly affected (P<0,05) regrowth I DM, and regrowth I CF. While photoperiod treatment were significantly affected (P<0,05) regrowth I DM, regrowth I OM, and regrowth I CF. The interaction between the types of fertilizer and photoperiod treatment was significantly affected (P<0,05) regrowth I DM and CF. Based on research results, it can be concluded that the types of green fertilizer from PIAT and dolomite to produce the nutrient content regrowth I was the highest, resulting in 22,18% DM, 29,32% CP, 9,38% CF respectively. The nutrient content of regrowth I that produce the highest results of photoperiod was 12 h = 28,80% CP, 16 h = 20,92% DM, 20 h = 89,38% OM, 9,16% CF.
Rice is the staple food of more than half the world's population. Mixing rice with other food ingredients to become the staple food is never done; therefore the dependence on rice becomes very high. The source of food that contained carbohydrate is diverse such as potatoes, wheat, bananas, cassava and others. This study aims to determine glycemic index and nutrient composition of rice purple sweet potato. The type of research is an experimental study to create a new staple food by mixing rice with purple sweet potato. The main object of research is rice and purple sweet potato with ratio 1: 1 and a blood sample of the subject. The subjects were six women who analyzed their blood glucose levels at every 15 minutes during the first 1 hour and every 30 minutes during the second hour. The results showed the nutrient composition of rice purple sweet potato among others: the water content 53.7%, ash 0.2%, 4.4% protein, 0.6% fat, 40.7% carbohydrates, crude fiber 0.17 %, and the energy content is 235 kcal. The glycemic index in rice purple sweet potato with white bread as food reference is 67 which are included in the category of food that has a moderate glycemic index (55-70). The rice purple sweet potato potentially as a staple food with a lower glycemic index than the staple food white rice with glycemic index 89. Further research about the glycemic index of rice purple sweet potato as a mixture with other compositions need to do for the purpose of food diversification.
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