The nutritional characteristics of rape

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Rape is a crop that requires more fertilizer and stronger fertility. The amount of nitrogen, phosphorus, and potassium required is greater than that of the grass crops, and the absorption of boron, calcium, and other trace elements greatly exceeds that of other crops. Rapeseed has a well-developed root system, strong ability to absorb soil nutrients, and a high utilization rate of fertilizer. The role of hybrid rapeseed is more pronounced. For conventional rapeseed varieties, 5.8 kg of nitrogen (N), 2.5 kg of phosphorus (P2O5), and 4.3 kg of potassium (K2O) are required for forming 100 kg of rapeseed. For every hybrid rape produced, 100 kg of rapeseed is required to have 4.03 kg of nitrogen (N), 1.67 kg of phosphorus (P2O5), and 6.16 kg of potassium (K2O), and N: P2O5: K2O is 1:0.41:1.53. The absorption of nutrients at different growth stages of rape was consistent with that of conventional rape and hybrid rape. The bud-early flowering stage is the peak period of rape nutrient absorption. 50% of nitrogen (N), 65% of phosphorus (P2O5) and 60% of potassium (K2O) are absorbed by this stage. Seedlings - rape buds require a large amount of fertilizer, 40% nitrogen (N), 30% phosphorus (P2O5), 30% potassium (K2O) is absorbed at this stage. It indicated that during the period of vegetative growth of rapeseed and the period between vegetative growth and reproductive growth, the nutrient accumulation of nitrogen, phosphorus and potassium in the plant reached 90% of the total. During the initial flowering-final flowering period, rape plants still absorb a certain amount of nitrogen, phosphorus and potassium. From the end of flowering to maturity, the plants have absorbed very few nutrients, and the leaves gradually tend to age and fall off. From the point of view of dry matter accumulation at different growth stages of rapeseed, it was basically synchronized with the accumulation of nutrients. Emergence and bud emergence accounted for 3/5 of the total growth period, mainly vegetative growth, and dry matter accumulation accounted for dry matter accumulation during the whole growth period. 19.4% of the total. From flower buds to early flowering stages, the bud stage, the period of vegetative growth and reproductive growth, dry matter accumulation accounted for 58.1% of total accumulation, which is the peak period of dry matter accumulation. From the beginning of flowering to the final flowering period, the rapeseed is called the flowering period. The vegetative growth is slowed down and the reproductive growth is dominant. Dry matter accumulation accounts for 13.4% of the total. From the final flowering stage to mature stage, the fruit development and maturation period lasted for about 31 days. The vegetative growth basically stopped and the reproductive growth was the main factor. The dry matter accumulation accounted for only about 9.1% of the total accumulation.


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