论文部分内容阅读
在黑河流域中游张掖市的高原夏菜生产中,以“春月黄”娃娃菜品种为试材,试验采用双因素随机区组设计,研究了不同水氮互作模式对其光合特性与水氮利用的影响。结果表明:以优化灌水定额(1125 m3 hm-2)与优化施氮量(300 kg hm-2)组合处理(A2N2)的娃娃菜,在结球前期(5月25日)、中期(6月10日)、末期(6月25日),测定的光合速率(Pn)和蒸腾速率(Tr)变化规律相一致,均表现为:中期>末期>前期;不同处理对Pn和Tr的影响顺序为:优化灌水定额和优化施氮量(A2N2)>经验灌水定额和优化施氮量(A1N2)>轻度亏水灌溉定额和优化施氮量(A3N2)>优化灌水定额和经验施氮量(A2N1)>经验灌水定额和经验施氮量(A1N1)>轻度亏水灌溉定额和经验施氮量(A3N1)>经验灌水定额和零施氮量(A1N3)>优化灌水定额和零施氮量(A2N3)>轻度亏水灌溉定额和零施氮量(A3N3);采用A2N2处理的娃娃菜,其植株叶片的光系统Ⅱ实际光化学量子产量(ΦPSⅡ)、PSⅡ有效光化学量子产量(Fv’/Fm’)和光化学猝灭系数(q P)值最高,分别为0.38、0.49和0.66,而其非光化学猝灭系数(q N)和光抑制程度最低,为0.543和-0.197;同时娃娃菜地上部分叶数、横茎、纵茎与经济产量分别为42.26片、18.54 cm、24.38 cm和89.55 t hm-2,明显高于其它处理。由此可见,以水氮组合A2N2来指导本区娃娃菜生产,可达到高产高效、降低环境污染的目的。
In the production of plateau summer vegetables in Zhangye city in the middle reaches of the Heihe River basin, the experiment was conducted with two-factor randomized block design with “Spring-Spring-yellow” baby-baby vegetable cultivars. The effects of different water-nitrogen interaction modes on photosynthetic characteristics Impact of water and nitrogen use. The results showed that the treatment of A2N2 with optimized irrigation standard (1125 m3 hm-2) and optimized nitrogen application (300 kg hm-2) (Pn) and transpiration rate (Tr) in the late stage (June 10) and the end stage (June 25), respectively. The results showed that the order of the effect of different treatments on Pn and Tr was (A2N2)> experienced irrigation quota and optimized nitrogen application rate (A1N2)> light deficit irrigation quota and optimized nitrogen application rate (A3N2)> optimized irrigation quota and experienced nitrogen application rate (A2N1) )> Experience irrigation quota and experience nitrogen (A1N1)> mild deficit irrigation quota and experienced nitrogen application (A3N1)> experience irrigation quota and zero nitrogen application (A1N3)> optimum irrigation quota and nitrogen application ( A2N3)> slight irrigation deficit irrigation standard and nitrogen (A3N3); A2N2 treatment of the baby plant, the photosystem Ⅱ photochemical quantum yield (ΦPS Ⅱ), PS Ⅱ effective photochemical quantum yield (Fv ’/ Fm ’) And photochemical quenching coefficient (q P) were the highest (0.38,0.49 and 0.66, respectively), while the lowest values of q N and light inhibition were 0.543 and -0.197, respectively. When the number of leaves Doll portion vegetable, horizontal stems and the vertical stems and economic production was 42.26, 18.54 cm, 24.38 cm and 89.55 t hm-2, significantly higher than others. Thus, water and nitrogen combinations A2N2 to guide the baby doll production in this area, can achieve high yield and high efficiency, reduce environmental pollution purposes.