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首页> 外文期刊>Landbauforschung >Interactive effects of soil water content and phytin supply on phosphorus nutrition of different crops species
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Interactive effects of soil water content and phytin supply on phosphorus nutrition of different crops species

机译：土壤水分和植物生长素供应对不同农作物磷营养的交互作用

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An eight week pot experiment was conducted under semi controlled conditions to investigate the interactive effects of organic P nutrition and drought stress on P utilisation of four different crop species.Two P treatments were established: organic P supply with phytin (0.40 g P per pot) and a control without any additional P supply. The two water treatments were irrigated according to 60 % (well watered) and 30 % (drought stress) water holding capacity ofthe soil.The P uptake, shoot biomass and proline content of sorghum (Sorghum bicolorx Sorghum sudanense), amaranth (Amaranthus cruentus), oilseed rape (Brassica napus) and rye (Secale cereale) were studied. Furthermore, in the soil we measured the pH value, soilP pools (soluble in water, double-lactate and oxalate) as well as the P sorption capacity, degree of P saturation and the activities of acid and alkaline phosphatases.Drought stress reduced the P uptake of sorghum and rye, while P uptake of amaranth and oilseed rape was not affected by water supply. The application of organic P increased the plant P uptake and biomass production in both water treatments about 30 % butdid not mitigate the effects of water stress. Drought resulted in higher proline contents in plant tissue; significantly elevated values were measured in oilseed rape and rye. The activity of acid phosphatase in soil was increased in the treatments withdrought stress as well as after organic P supply. Soil P pools were affected by the balance of P supply and plant P uptake, but obviously not by the water treatments.The results suggest crop specific reactions on water shortage and P deficiency, which should be taken into consideration for P fertilization recommendations.
机译：在半控制条件下进行了为期八周的盆栽试验，以研究有机磷营养与干旱胁迫对四种不同作物品种磷利用的交互作用。建立了两种磷处理方法：供应含植物素的有机磷（每盆0.40 g磷）以及没有任何额外P供给的控件。根据土壤的60％（灌溉充足）和30％（干旱胁迫）的持水能力灌溉两种水处理方法。研究了油菜（甘蓝型油菜）和黑麦（Secale谷物）。此外，我们在土壤中测量了pH值，土壤P池（可溶于水，双乳酸和草酸盐）以及P的吸附能力，P饱和度以及酸和碱性磷酸酶的活性。干旱胁迫降低了P高粱和黑麦的吸收量，a菜和油菜的磷吸收量不受供水的影响。在两种水处理中，有机磷的施用均增加了植物对磷的吸收和生物量的产生，但并没有减轻水分胁迫的影响。干旱导致植物组织中脯氨酸含量增加;油菜和黑麦中测得的值显着升高。在干旱胁迫下以及施用有机磷后，土壤中酸性磷酸酶的活性均增加。土壤磷库受磷供应和植物磷吸收的平衡的影响，但显然不受水处理的影响。研究结果表明，作物对缺水和磷缺乏的具体反应，建议采用磷肥。

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