Effects of Breaking Plow Pan Thoroughly or Partially on Agronomic Traits and Yield of Summer Maize in the Northern Region of Huang-Huai-Hai Plain
Gao Jiansheng
Guo Jianjun
Cui Huini
Dong Guohao
Guo Lianghai
Guo Zhihui
Hu Chuanzhou
Li Yongjun
Abstract：Annual rotary tillage has created a compacted plow pan and shallow arable layer which ham-per the high crop yield in the Huang-Huai-Hai Plain region.In order to explore the effects of breaking the plow pan by different degrees on agronomic traits and yield of summer maize,the field experiments were con-ducted in Huangheya Village,Dezhou City of Shandong Province during 2014.Four treatments were conduc-ted,including the original plow pan(RT15),breaking the plow pan by 1/3(DL20),breaking the plow pan by 2/3(DL25),breaking the plow pan thoroughly(DL40).The results showed that the plant height,leaf ar-ea,net photosynthetic rate,ground/underground dry matter and yield of summer maize increased with the in-crease of breaking degree of plow pan when breaking the plow pan partially.All the above indexes of DL25 treatment were the highest and the yield increased by 4.6%, 6.1% and 17.3% respectively than that of DL40,DL20 and RT15.While breaking the plow pan thoroughly was not beneficial to the promotion of yield indexes and even decreased slightly.In summary, the plow pan hindered the crop growth under the present cultivation method and the cultivated layer structure in the northern region of Huang-Huai-Hai Plain.Com-prehensively considering the economic and environmental benefits,breaking the plow pan by 2/3(DL25)was the best choice which could remarkably promote the summer maize yield.
Keywords：MaizeTillage treatmentsPlow panYieldThe Huang-Huai-Hai Plain
Publication Date：2018-03-02
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 36-40 )