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Position: Home > Articles > Coupling Effects of Irrigation and Phosphorus Fertilizer Applications on Phosphorus Uptake and Use Efficiency of Winter Wheat Journal of Integrative Agriculture 2013,12 (2)

Coupling Effects of Irrigation and Phosphorus Fertilizer Applications on Phosphorus Uptake and Use Efficiency of Winter Wheat

作者：

Wang Yu;Chi Shu-yun;Ning Tang-yuan;Tian Shen-zhong;Li Zeng-jia

单位：

Shandong Agr Univ, Coll Mech & Elect Engn, Tai An 271018, Shandong, Peoples R China;Shandong Agr Univ, State Key Lab Crop Biol, Minist Sci & Technol,Minist Agr,Coll Agr, Key Lab Crop Water Physiol & Drought Tolerance Ge, Tai An 271018, Shandong, Peoples R China

关键词：

winter wheat;coupling effect;irrigation;phosphorus

摘要：

The water content and nutrient in soil are two main determine factors to crop yield and quality, managements of which in field are of great importance to maintain sustainable high yield. The objective of this study was to measure the uptake, forms, and use efficiency of phosphorus (P) in wheat under four levels of irrigation (WO, W1, W2, and W3) and three levels of P application (P0, P1, and P2) through two growth seasons of wheat (2008-2010). The field experiment was carried out in a low level of soil P concentration and the cultivar was Jimai 20. The results indicated that P fertilizer combined with irrigation not only improved the activity of phosphatase in soil, but also increased P accumulation in wheat, similar results was found in the grain of wheat, the content of total P increased significantly. Meanwhile, the mainly existence forms of P in grain were the lecithoid-P and labile organic-P. On the other hand, in comparison to the irrigation, the dry matter and grain P production efficiency and postponing P application of wheat increased with increasing P application rates within the range of 0-180 kg P2O5 ha(-1). The interaction between P and irrigation also significantly (P<0.01) affected on the P accumulation, grain total P, grain phospholipid P, and P production efficiency. In this study, therefore, the P applications and irrigation improved grain P production efficiency and postponing P application of winter wheat, and W2P2 treatment (180 kg P2O5 ha(-1) combination with 120 mm irrigation) had a high P accumulation and P use efficiency, it was an optimum level for P fertilizer application and irrigation in this region.

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Coupling Effects of Irrigation and Phosphorus Fertilizer Applications on Phosphorus Uptake and Use Efficiency of Winter Wheat

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