...瓜； 嫁接； 低磷胁迫； 磷吸收； 磷利用； 根系形态； 光合作用 [gap=1305]Key words: Watermelon； Grafting； Low P stress； P uptake； P utilization； Root morphology； Photosynthesis ..
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The families with great P efficiency have great height growth rate, high productivity and extensive lateral root system under low phosphorus stress and low sensitivity to phosphorus supply.
磷效率高的家系具有在低磷胁迫下苗高生长量大、干物质积累能力强、须侧根发达及对磷肥投入敏感性低等特点。
Results showed that the increase of root_shoot ratio was an active adaptive response of P. massoniana to low phosphorus stress.
结果表明：根冠比提高是马尾松对低磷胁迫的一种主动适应性反应机制；
The results of sandy culture showed that the dry weight of shoot and yield of biomass of DT and DTXC decreased under low-N, low-P, low-K stress.
砂培试验表明，在低氮、低磷、低钾胁迫下，东塘、东塘西侧地上部干重、生物学产量降低；
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