nlwxpearo
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 Posted: Fri 10:17, 14 Jan 2011 Post subject: Acid soil fertile radish and wheat on the uptake o |
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Acid soil fertile radish and wheat on the uptake of low-grade phosphate rock
Wheat rhizosphere BrayI. P deficiency range from Figure 2b and Figure 3b shows room facilities were out of wheat flour in the case of phosphate, and its rhizosphere BrayI. P deficiency is not obvious. However, the outer chamber of the pilot Ⅱ phosphorus levels (200mg · kgI1) higher than the test I, (50rag · kgI1). Therefore, a relatively weak test Ⅱ deficiency phenomenon, which some may be caused by pilot error. Overall. Facilities outside the room of wheat to phosphate powder is not effective use. 4 to discuss the test results, the fertile radish activation, the ability of low-grade phosphate rock is relatively strong, and should take full advantage of this rich green manure P effects to fertility fertility, rapid increase in acid soil available P levels. Fertilizers dill and white lupine, rape and other plants, like activation, the ability of insoluble phosphate and its secretion of organic acids the main characteristics of the relevant -1 Sichuan, fertile radish deficiency is a major secreted in a large number of tartaric acid, to activate its role through the integration of including phosphate rock,[link widoczny dla zalogowanych], including various forms of insoluble phosphate. In this paper cultivation method of Net proved indirectly. Fertile radish root secretion of organic acids by way of activation of roots can not cross the outer room of rock phosphate in soil. Because the analysis showed that rock phosphate applied outside the room near retinal area (0-5mm or so) of soil BrayI. P a serious deficit. Deficit value is close to the soil outside the chamber is not applied rock phosphate levels. Preliminary view, mainly because of fertile radish roots in the lack of P stress, large amount of organic acid secretion. These organic acids in soil solution with a liquid diffusion into the area outside the room (through nylon omentum), met outside the room when the phosphate rock in soil. Will be through the sequestration of activated partial P tangled, and then spread back to the root chamber with the soil solution, and then absorbed by plant roots. So the outer part of room near retinal zone in the soil BrayI. P deficiency. However,[link widoczny dla zalogowanych], because the root secretion of organic acids into the area outside the room number is relatively small,[link widoczny dla zalogowanych], so the activation of insoluble P is relatively small,[link widoczny dla zalogowanych], plant uptake is limited, soil BrayI. Narrow range of P deficiency. From the experimental results, the simple P not affect this part of the plant biomass was significantly changed. The results showed that, regardless of whether the soil fertile radish root chamber was applied to phosphate rock, as long as the soil outside the chamber was applied to phosphate rock, outside the room near retinal area (rhizosphere range) BrayI. P appeared in the same degree of deficit. About how to interpret this phenomenon, the authors believe may be applied into the phosphate fertilizers on radish root powder room still feel the lack of soil P stress (because of rock phosphate is insoluble phosphate),[link widoczny dla zalogowanych], which appeared in the same fertile radish secretion of organic acids such as stress reaction, and finally result in the same rhizosphere BrayI-P deficiency. The results from the wheat of view, it acidic red soil on the basic low-grade phosphate rock can not be effectively utilized, the results of previous studies with similar 【2.4.51. '
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