叶面喷施炭吸附聚谷氨酸对玉米生长发育的影响

为探究一种新型炭吸附聚谷氨酸水溶肥对玉米光合性能、渗透调节、养分吸收及产量的影响。以郑单958和郑单1868为材料,采用田间小区试验,在拔节期设置喷施清水（CK）和喷施炭吸附聚谷氨酸（T）2个处理,15d后比较2个处理叶片的叶绿素含量、光合作用强度、水分利用率、气孔、抗氧化酶活性、渗透调节物含量、植株氮、磷和钾含量、百粒鲜重和产量。结果表明,与CK处理相比,T处理极显著提高了郑单958和郑单1868叶片的叶绿素含量、净光合速率、水分利用率和气孔张开数目,同时二磷酸核酮糖加氧酶、超氧化物歧化酶、过氧化物酶、抗坏血酸过氧化物酶的活性,脯氨酸含量及关键酶基因（ZmSOD、ZmPOD、ZmAPX和ZmP5CR）的表达量也显著提高。T处理提高了郑单958和郑单1868植株的氮、磷和钾含量、百粒鲜重和产量。灰色关联分析表明,光合作用、气孔张开程度、抗氧化酶活性和百粒重与产量密切相关。

Effects of Foliar Spraying with Carbon-Adsorbed Polyglutamic Acid on Growth and Development of Maize

To explore the effects of a new type of carbon-adsorbed polyglutamic acid water-soluble fertilizer on photosynthetic performance, osmotic regulation, nutrient absorption and yield of maize. Zhengdan 958 (ZD958) and Zhengdan 1868 (ZD1868) were used as materials. Field plot experiments were carried out, set two treatments of spraying clear water (CK) and spraying carbon to adsorb polyglutamic acid (T) in jointing stage. After 15 days of treatment, the chlorophyll contents, net photosynthetic rates, water use efficiency, stomata, antioxidant enzyme activities, contents of osmotic regulators, plant nitrogen, phosphorus and potassium contents, 100-seed fresh weight and the yield of the two treatments were compared. Compared with CK treatment, T treatment significantly increased chlorophyll content, photosynthetic intensity, water use efficiency, and open-stomata number of leaves, the activities of superoxide dismutase, peroxidase, ascorbate peroxidase, Pro content and the expression levels of key enzyme genes (ZmSOD, ZmPOD, ZmAPX and ZmP5CR). T treatment significantly increased the nitrogen, phosphorus and potassium contents, 100-seed fresh weight and yield of maize. In addition, the gray correlation analysis showed that photosynthesis, open-degree of the stomata, the activities of antioxidant enzyme and the 100-seed weight were closely related to the yield.