水肥一体化下番木瓜养分吸收累积规律

Papaya Nutrient Uptake and Accumulation Under Drip Fertigation

通过大田试验,研究在水肥一体化滴灌施肥条件下番木瓜的生长及植株不同生长时期不同器官氮磷钾养分的吸收累积规律。结果表明,在不同生长时期,番木瓜的根、茎、叶、果实等不同器官的氮、磷、钾含量存在显著的差异性。在氮、磷、钾三要素中,番木瓜对钾的需求量最大,其次为氮,磷最少,表现为不同器官在同一测定时期内的氮、磷、钾含量由高到低依次为钾>氮>磷。在不同器官对氮、磷、钾的吸收累积量中,对氮的吸收累积量表现为:果实>叶>根>茎,对磷的吸收累积量表现为:果实>茎>根>叶,对钾的吸收累积量表现为:果实>根>茎>叶;但是,同一器官中,氮、磷、钾的累积量均表现为钾>氮>磷。

A field experiment was carried out to evaluate the growth, nutrient uptake ＇and accumulation of papaya under drip fertigation system. The results obtained were as follows： the nitrogen, phosphorus and potassium contents of roots, leaves, stems and fruits were different in the growth phase. Under the experiment condition, the requirement of potassium was the most, then nitrogen and phosphorus, and the contents of nitrogen, phosphorus and potassium in different parts were in the rank of potassiumin〉nitrogen〉phosphorus at the same measurement time. N, P and K were absorbed at the whole growth stage, nitrogen accumulation was in the rank of fruits〉 leaves〉roots〉stems, phosphorus accumulation was in the rank of fruits〉stems〉roots〉leaves, potassium accumulation was in the rank of fruits〉roots〉stems〉leaves. However, nitrogen, phosphorus and potassium accumulation in the same part were all in the rank of potassium〉nitrogen〉phosphorus.