1. 不同量氮肥与配施生物炭对春小麦光合特性 和干物质积累及产量的影响.
- Author
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赵立宁, 张力月, 孟祥睿, 郭颂, 杨梅, 马磊, and 杨卫君
- Subjects
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FERTILIZER application , *BIOCHAR , *PHOTOSYNTHETIC rates , *BLOCK designs , *FERTILIZERS - Abstract
[Objective] The paper aimed to study the effects of combined application of biochar and nitrogen fertilizer on SPAD value, photo- synthetic characteristics, dry matter accumulation, transport, grain filling rate and yield of spring wheat in irrigation area of northern Xinjiang, which provided a basis for rational application of different amounts of nitrogen fertilizer and combined application of biochar in irrigation area of northern Xinjiang and increasing yield and efficiency of farmland. (Method) In the study, the high-quality spring wheat variety Xinchun 37' in Xinjiang was used as the test material, and a randomized block design was used, four nitrogen fertilizer levels were set up as non-nitro- gen fertilizer (NO:0 kg/hm²), conventional nitrogen fertilizer (N1: 300 kg/hm²), nitrogen fertilizer reduction 15% (N²: ²55 kg/hm²), nitrogen fertilizer reduction 30% (N3: ²10 kg/hm²); Two biochar levels were set up as non-biochar (BO:0 kg/hm²) and biochar (B1: ²0 x 10³ kg/hm²), including 8 treatments as BONO, BINO, BONI, BINI, BON², BIN², BON3, BI N3; The SPAD value of flag leaf, photosynthetic indexes (net photosynthetic rate, stomatal conductance, transpiration rate, intercellular CO, concentration), dry matter accumulation and transport during growth period, grain filling rate, yield and its composition of spring wheat were measured, to clarifying the effects of different a-mounts of nitrogen fertilizer and biochar on the growth of spring wheat. (Result) Compared with non-biochar and non-nitrogen fertilizer (BONO),15% reduction of nitrogen fertilizer combined with biochar (B1N²) could significantly increased the SPAD value of flag leaf, net photosynthetic rate, stomatal conductance, transpiration rate, dry matter accumulation and transport rate, grain filling rate and yield of spring wheat. Under the BIN² treatment, the SPAD value increased by 13.17%-91.70%, the net photosynthetic rate increased by 17.4²% 87.30%, the stomatal conductance increased by 16.00%-²9.41%, and the transpiration rate increased by ²5.35% -79.81%. At the maturity stage of spring wheat, the dry matter of grains increased by ²8.87%, and the yield increased by 30.²3%. [Conclusion] Appropriate amount of biochar ²0 x 10³ kg/hm² and nitrogen fertilizer ²55 kg/hm² (B1 N²) can initially achieve the purpose of increasing spring wheat yield and reducing nitrogen fertilizer application, and provide a theoretical basis for the formulation of scientific application strategies of nitro- gen fertilizer and biochar in farmland in northern Xinjiang irrigation area. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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