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

• Published in: Journal of Integrative Agriculture Vol. 12; no. 2; pp. 263 - 272
• Main Authors: WANG, Yu, CHI, Shu-yun, NING, Tang-yuan, TIAN, Shen-zhong, LI, Zeng-jia
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.02.2013; Science Press; State Key Laboratory of Crop Biology, Ministry of Science and Technology/Key Laboratory of Crop Water Physiology and Drought-Tolerance Germplasm Improvement, Ministry of Agriculture/College of Agriculture, Shandong Agricultural University, Tai'an 271018, PR.China%College of Mechanical & Electronic Engineering, Shandong Agricultural University, Tai'an 271018, P.R.China; KeAi Communications Co., Ltd
• Subjects: coupling effect; crop yield; cultivars; fertilizer rates; field experimentation; irrigation; irrigation rates; nutrient content; phospholipids; phosphorus; phosphorus fertilizers; soil; soil nutrients; water content; winter wheat; winter wheat coupling effect irrigation phosphorus; 冬小麦; 利用效率; 土壤磷酸酶活性; 施磷; 施肥; 灌溉; 磷吸收; 耦合效应; irrigation; winter wheat; coupling effect; phosphorus
• ISSN: 2095-3119; 2352-3425
• DOI: 10.1016/S2095-3119(13)60225-7

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 （W0, 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 eultivar 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 Papplication 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.