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在保护地条件下 ,研究了不同肥力条件下番茄施用氮磷钾肥料的增产效果及其养分吸收分配规律。结果表明 ,在施农家肥 36t/hm2 基础上 ,施N 187 5kg ,可获得最高产量 ,但随施氮量增加 ,产量下降 ;土壤有效P含量超过 10 0mg/kg ,磷肥基本无效 ,且随施磷量增加 ,产量有降低趋势 ;土壤有效K含量达 2 16mg/kg时 ,施钾肥仍可增产 8 2 %。保护地番茄干物质累积主要在盛果期 ,根、叶、茎、果的平均干重 ,分别占总干物重的 2 11%、2 3 6%、2 8 2 4 %、4 5 98%。番茄植株中N、P、K养分含量特点是 ,茎和果实中K的含量超过了N、P含量 ,也超过了根和叶中K含量 ;而叶中N含量高于根、茎和果实。保护地番茄采用露地栽培技术 ,留 3穗果后打顶 ,产量水平在 67388～ 80 960kg/hm2 时 ,N的吸收量为 177～ 2 38kg/hm2 、P2 O5的吸收量为 79～ 97kg/hm2 、K2 O吸收量为 2 12～ 30 9kg/hm2 ,氮磷钾的比例为 :1∶0 4 1～ 0 4 5∶1 2 1～ 1 30 ,与露地番茄的养分吸收量相近
Under the conditions of protected areas, the effects of nitrogen and phosphorus fertilizers on the yield and nutrient absorption and distribution of tomato under different fertility conditions were studied. The results showed that under the application of 36t / hm2, the yield of N 187 5kg was the highest, but the yield was decreased with the increase of N application rate. The available P content of soil exceeded 10 0 mg / kg, and the phosphorus fertilizer was basically ineffective. Phosphorus content increased, yield decreased; soil available K content of 2 16mg / kg, the application of potassium can still yield 82%. The average dry weight of roots, leaves, stems and fruits in tomato growing in the protected area was 21.1%, 23.6%, 28.4% and 458% of the total dry weight, respectively. The nutrient contents of N, P and K in tomato plants were characterized by that K content in stem and fruit surpassed N and P content and also exceeded K content in roots and leaves; while N content in leaves was higher than that in roots, stems and fruits. Tomatoes in the protected area were planted in open field, leaving 3 spike fruits topping. The yield of N was 177-238kg / hm2 and the yield of P2 O5 was 79-97kg / hm2 at the yield level of 67388-80960kg / hm2 , The K2 O uptake was 2 12 ~ 30 9 kg / hm2, the N, P and K ratios were 1:04 1 ~ 0 4 5:1 2 1 ~ 1 30, similar to the nutrient uptake of tomato in the open field