Forage yield, soil water depletion, shoot nitrogen and phosphorus uptake and concentration, of young and old stands of alfalfa in response to nitrogen and phosphorus fertilisation in a semiarid environment

Bélanger, 2008, Phosphorus and nitrogen relationships during spring growth of an aging timothy sward, Agron. J., 100, 1757, 10.2134/agronj2008.0132 Bélanger, 2015, Shoot growth, phosphorus–nitrogen relationships, and yield of canola in response to mineral phosphorus fertilization, Agron. J., 107, 1458, 10.2134/agronj15.0050 Berg, 2007, The long-term impact of phosphorus and potassium fertilization on alfalfa yield and yield components, Crop Sci., 47, 2198, 10.2135/cropsci2006.09.0576 Blad, 1976, Evaluation of resistance and mass transport evapotranspiration models requiring canopy temperature data, Agron. J., 68, 764, 10.2134/agronj1976.00021962006800050020x El-Kahloun, 2000, A comparison of the nutrient status of Molinia caerulea and neighbouring vegetation in a rich fen, Belgian J. Bot., 133, 91 Fan, 2011, Influence of 24 annual applications of fertilisers and/or manure to alfalfa on forage yield and some soil properties under dryland conditions in northern China, Crop Pasture Sci., 62, 437, 10.1071/CP10370 Fixen, 1983, Phosphorus and potassium fertilization of irrigated alfalfa on calcareous soils: II. Soil phosphorus solubility relationships, Soil Sci. Soc. Am. J., 47, 112, 10.2136/sssaj1983.03615995004700010023x Forster, 1995, Soil sampling, handling, storage and analysis, 49 Güsewell, 2004, N: P ratios in terrestrial plants: variation and functional significance, New Phytol., 164, 243, 10.1111/j.1469-8137.2004.01192.x Grace, 1998, On the use of path analysis and related procedures for the investigation of ecological problems, Am. Nat., 152, 151, 10.1086/286156 Guan, 2013, Two perennial legumes (Astragalus adsurgens Pall. and Lespedeza davurica S.) adapted to semiarid environments are not as productive as lucerne (Medicago sativa L.), but use less water, Grass Forage Sci., 68, 469, 10.1111/gfs.12010 Halvorson, 1980, Alfalfa for hydrologic control of saline seeps, Soil Sci. Soc. Am. J., 44, 370, 10.2136/sssaj1980.03615995004400020032x Hannaway, 1993, Nitrogen fertilization in alfalfa production, J. Prod. Agric., 6, 80, 10.2134/jpa1993.0080 Houlton, 2008, A unifying framework for dinitrogen fixation in the terrestrial biosphere, Nature, 454, 327, 10.1038/nature07028 Jia, 2006, Dynamics of soil organic carbon and soil fertility affected by alfalfa productivity in a semiarid agro-ecosystem, Biogeochemistry, 80, 233, 10.1007/s10533-006-9020-z Jiang, 2006, Soil carbon pool and effects of soil fertility in seeded alfalfa fields on the semi-arid Loess Plateau in China, Soil Biol. Biochem., 38, 2350, 10.1016/j.soilbio.2006.02.008 Koerselman, 1996, The vegetation N:P ratio: a new tool to detect the nature of nutrient limitation, J. Appl. Ecol., 33, 1441, 10.2307/2404783 Li, 2008, Pasture yield and soil water depletion of continuous growing alfalfa in the Loess Plateau of China, Agric. Ecosyst. Environ., 124, 24, 10.1016/j.agee.2007.08.007 Li, 1995, Study on field water balance of Loess Plateau, J. Soil Water Conserv., 9, 39 Li, 1999, Effects of clear plastic film mulch on yield of spring wheat, Field Crops Res., 63, 79, 10.1016/S0378-4290(99)00027-1 Markewitz, 2010, Soil moisture depletion under simulated drought in the Amazon: impacts on deep root uptake, New Phytol., 187, 592, 10.1111/j.1469-8137.2010.03391.x Miller, 1981, Saline seep development and control in the North American Great Plains-Hydrogeological aspects, Agric. Water Manage., 4, 115, 10.1016/0378-3774(81)90047-0 Murphy, 1962, A modified single solution method for the determination of phosphate in natural waters, Anal. Chim. Acta, 27, 31, 10.1016/S0003-2670(00)88444-5 Nasto, 2014, Interactions among nitrogen fixation and soil phosphorus acquisition strategies in lowland tropical rain forests, Ecol. lett., 17, 1282, 10.1111/ele.12335 Sanderson, 1993, Stand dynamics and yield components of alfalfa as affected by phosphorus fertility, Agron. J., 85, 241, 10.2134/agronj1993.00021962008500020015x Schachtman, 1998, Phosphorus uptake by plants: from soil to cell, Plant Physiol., 116, 447, 10.1104/pp.116.2.447 Shi, 2003, Moisture properties in soil profiles and their relation to landform at Zhonglianchuan small watershed, Agr. Res. Arid Areas, 21, 101 Venterea, 2008, Profile analysis and modeling of reduced tillage effects on soil nitrous oxide flux, J. Environ. Qual., 37, 1360, 10.2134/jeq2007.0283 Vitousek, 1991, Nitrogen limitation on land and in the sea: how can it occur?, Biogeochemistry, 13, 87, 10.1007/BF00002772 Walworth, 1987, The diagnosis and recommendation integrated system (DRIS), 149, 10.1007/978-1-4612-4682-4_4 Wang, 2003, Characteristics related to symbiotic nitrogen fixation of legumes in northwest arid zone of China, Acta Bot. Boreal.-Occident. Sin., 23, 1163 Ward, 2003, Water budgets and nutrients in a native Banksia woodland and an adjacent Medicago sativa pasture, Plant Soil, 257, 305, 10.1023/A:1027331712165 Ward, 2006, Using soil, climate, and agronomy to predict soil water use by lucerne compared with soil water use by annual crops or pastures, Crop Pasture Sci., 57, 347, 10.1071/AR04132 Ziadi, 2007, Relationship between P and N concentrations in corn, Agron. J., 99, 833, 10.2134/agronj2006.0199 Ziadi, 2008, Relationship between phosphorus and nitrogen concentrations in spring wheat, Agron. J., 100, 80, 10.2134/agronj2007.0119