摘要
为探究叶面喷施甜菜碱对夏玉米产量形成及抗氧化能力的调控作用,于2019—2020年在山东农业大学试验农场进行试验,选用京农科728 (Jingnongke 728, JNK)和登海618 (Denghai 618, DH)作为试验材料,设6月5日(early sowing date, E)、6月15日(normal sowing date, N)和6月25日(late sowing date, L) 3个播期,拔节期(V6)和大喇叭口期(V12)两次叶面喷施10 mmol L^(–1)甜菜碱(leaf-spraying glycine betaine, GB)、等量清水(control check, CK)两种处理方式。结果表明,与喷施清水相比,JNK和DH喷施甜菜碱后的产量增幅分别为3.05%~12.81%和2.08%~7.83%。较对照处理,2019年,JNK品种3个播期(E、N和L)甜菜碱处理的总小花数,分别增加5.09%、4.70%和2.27%,DH品种变化不显著;2020年DH品种分别增加8.28%、3.95%和4.81%, JNK品种变化不显著;2个品种2年穗粒数的增幅为0.22%~6.45%,籽粒百粒重平均增加0.88 g、0.06 g和–0.46 g;超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性, 3个播期平均分别增加1.23%、3.36%和3.20%,丙二醛(MDA)含量减少11.73%。喷施甜菜碱缩小了不同播期处理间产量的差异,有利于增加不同播期夏玉米的产量。
In order to explore the regulation of leaf-spraying glycine betaine on yield formation and antioxidation in summer maize, Jingnongke 728(JNK) and Denghai 618(DH) were selected as experimental materials at three different sowing dates of June 5(early sowing date, E), June 15(normal sowing date, N), and June 25(late sowing date, L) from 2019 to 2020. Besides,two leaf-spraying time treatments were conducted by using 10 mmol L^(–1) glycine betaine(GB) and clear water(CK) at V6 and V12 stages. The results showed that compared with CK, the yield of summer maize JNK and DH after spraying glycine betaine increased by 3.05%–12.81% and 2.08%–7.83%, respectively. The average total number of florets of JNK obtained in the different treatment of E, N, and L increased by 5.09%, 4.70%, and 2.27%, respectively, which was not notably changed among DH in 2019.In contrast, the average total number of florets of DH at the sowing dates of E, N, and L increased by 8.28%, 3.95%, 4.81%, respectively, which was not notably changed among JNK in 2020 after spraying betaine. The kernels per ear increased by 0.22%–6.45%, and the 100-kernel weight of E, N, and L increased by 0.88, 0.06, and-0.46 g, respectively. In addition, the activities of SOD, POD, and CAT increased by 1.23%, 3.36%, and 3.20%, respectively, while the content of MDA decreased by 11.73%.In conclusion, spraying betaine could reduce the yield difference at different sowing dates and was beneficial to improve the productivity of summer maize at different sowing dates.
作者
陈静
任佰朝
赵斌
刘鹏
张吉旺
CHEN Jing;REN Bai-Zhao;ZHAO Bin;LIU Peng;ZHANG Ji-Wang(College of Agronomy,Shandong Agricultural University/State Key Laboratory of Crop Biology,Tai’an 271018,Shandong,China;Shandong Maize Technology Innovation Center,Laizhou 261400,Shandong,China)
出处
《作物学报》
CAS
CSCD
北大核心
2022年第6期1502-1515,共14页
Acta Agronomica Sinica
基金
山东省重点研发计划项目(2021LZGC014-2)
国家现代农业产业技术体系建设专项(CARS-02-20)
山东省中央引导地方科技发展资金项目(YDZX20203700002548)资助。
关键词
夏玉米
甜菜碱
产量
结实率
籽粒灌浆
summer maize
glycine betaine
yield
seed setting rate
grain filling
