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Northwest University of Science and Technology (2010)

Different Cuitivation Methods on the Northwest Arid Spring Corn Photosynthetic Characteristic and Yield

Zhang Lin Chun

Titre : Different Cuitivation Methods on the Northwest Arid Spring Corn Photosynthetic Characteristic and Yield

Auteur : Zhang Lin Chun

Grade : Master’s Theses 2010

Université : Northwest University of Science and Technology

Résumé
In order to improve corn production in arid areas to achieve efficient use of water and fertilizer. Changwu Experimental Station in Shaanxi (typical rain-fed agriculture) set cultivation patterns (treatment), treatment 1 : farmers planting mode ; processing : high production and high efficiency mode ; 3 : yield efficient mode 2 ; treatment 4 : Record High yield ; treatment 5 : yield planting mode, measured five different cultivation patterns of spring corn yield, water use efficiency (WUE), nitrogen fertilizer growth bias force (PFP) and the changes in the parameters of photosynthetic characteristics explore the physiological mechanisms of corn production and synergy to improve the efficiency of water and fertilizer resources to provide the basis for the corn yield efficient cultivation theory. The results are as follows : 1. Processing 2 for 3, treatment 4 and treatment 5 compared to dealing with (farmers planting mode), the production yield increase of 13.57%, 20.83%, 58.52% and 36.66%, four kinds of cultivation modes are to achieve a production increase of 10-15% of the target. 2. Handling, processing 3, the handle 4 and 5 and processing (farmers planting mode) compared the water use efficiency (WUE) increased by 23.87%, 24.33%, 65.16% and 42.69%, respectively. The four kinds of cultivation mode WUE increased by 20% target. 3.5 kinds of different cultivation mode of nitrogen fertilizer partial growth force (PFP) were as follows : for 3 gt ; processing 2 gt ; treatment 5 gt ; processing 1 gt ; treatment 4 ; processing 3 for 2 handle 5 and processing 4 PFP than farmers cropping patterns were increased by 20.83%, 13.59%, 2.49% and -20.72%, indicating that the process 3 to achieve increased production by 10-15% and nitrogen use efficiency increased synchronization increase of 20%, and treatment processing 4, treatment 5 nitrogen fertilizer utilization lower than farmers planting mode, not to achieve high productivity and efficiency goals. 4. Pn, Gs, Fv / Fm, Yield, qP in the whole growth period, showed a single peak curve reaches its maximum when the silking stage, and then gradually reduced ; while Ci, NPQ contrast changes. Handle 4 processing 5 for 3, handling and processing compared Pn, Gs, Fv / Fm, Yield, qP high and silking to maturity rate of decline is smaller ; Pn average 35.4% qP average, 30.85%, 21.56%, 14.32%, Gs the average increased by 25.28%, 18.49%, 14.75%, 5.09%, Fv / Fm average of 40.78%, 35.45%, 27.43%, 18.56%, respectively ; values ??were increased by 38.4%, 33.46,22.36%, 15.4% ; Yield average of 36.3%, 31.58%, 21.86%, 14.8% ; handle 4 processing 5 for 3, handling and processing compared Ci, NPQ low silking to maturity rising velocity. Ci average decreased by 4.1%, 3.0%, 1.4%, 0.5%, NPQ average of 8.4%, 6.6%, 2.6%, 3.4% and 2.6%, respectively. Visible, integrated innovation through cultivation techniques, delayed leaf senescence, photosynthetic rate and actual photochemical efficiency, higher photosynthetic products ; 5, nine major photosynthetic characteristics parameters and yield, water use efficiency and nitrogen partial factor productivity Grey Relational Analysis found that, SPAD, Ci is the main limiting factors affect yield, water use efficiency and nitrogen partial productivity increased at the same.

Mots clés : Cultivation patterns Spring corn High yield and efficiency Gas exchange Chlorophyll fluorescence parameters

Présentation (Dissertationtopic)

Page publiée le 13 septembre 2014, mise à jour le 2 avril 2018