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辣椒生长期长,根系不发达,根量少,入土浅,不耐旱也不耐涝,耐肥能力强。辣椒为吸肥量较多的蔬菜类型,每生产1000千克约需氮5.19千克、五氧化二磷1.07千克、氧化钾6.46千克。在各个不同生育期,所吸收的氮、磷、钾等营养物质的数量也有所不同,从出苗到现蕾、初花期、盛花期和成熟期吸肥量分别占总需肥量的5%、11%、34%和50%,从初花至盛花结果是辣椒营养生长和生殖生长旺盛时期,也是吸收养分和氮素最多的时期,盛花至成熟期,植株的营养生长较弱,这时对磷、钾的需要量最多;在成熟果采收后,为了及时促进枝叶生长发育,这时又需较大数量的氮素肥。
Pepper grows long, underdeveloped roots, less root, shallow soil, not drought-resistant nor resistant to waterlogging, strong ability to resist. Pepper is the type of vegetable that absorbs more fertilizer, each producing about 1000 kg of nitrogen requires 5.19 kg, phosphorus pentoxide 1.07 kg, and potassium oxide 6.46 kg. At different growth stages, the amount of nitrogen, phosphorus, potassium and other nutrients absorbed is also different, from emergence to budding, early flowering, flowering and maturity, the amount of fat absorption accounted for 5% of the total amount of fertilizer, 11%, 34% and 50% respectively. From the beginning flower to the full flowering flower, the vegetative and reproductive growth of chili peppers was the period with the most nutrient and nitrogen uptake. The vegetative growth of plants was weaker when the flower was full to maturity Phosphorus, potassium demand most; mature fruit harvest, in order to promote the growth of foliage in time, then need a larger amount of nitrogen fertilizer.