Effects of subsoiling depth,period interval and combined tillage practice on soil properties and yield in the Huang-Huai-Hai Plain,China  

作　　者：WANG Yun-xia CHEN Shu-ping ZHANG Dong-xing YANG Li CUI Tao JING Hui-rong LI Yu-huan 

机构地区：[1]College of Engineering,China Agricultural University,Beijing 100083,P.R.China [2]Dryland Farming Institute,Hebei Academy of Agriculture and Forestry Sciences,Hengshui 053000,P.R.China

出　　处：《Journal of Integrative Agriculture》2020年第6期1596-1608,共13页农业科学学报（英文版）

基　　金：This work was supported by the Agricultural Public Welfare Industry Research,Ministry of Agriculture,China(201503117)and the earmarked fund for China Agriculture Research System(CARS-02).

摘　　要：Compact!on layers are widely distributed in the Huang-Huai-Hai Plain,China,which restrict root growth and reduce yields.The adoption of subsoiling has been recommended to disrupt compacted soil layers and create a reasonable soil structure for crop development.In this paper,the effects of subsoiling depth(30,35 and 40 cm),period interval(2 or 3 years)and combined pre-sowing tillage practice(rotary cultivation or ploughing)on soil condition improvement was studied on a tidal soil in the Huang-Huai-Hai Plain.Seve n tillage patter ns were desig ned by combini ng differe nt subsoili ng depths,period intervals and pre-sowing.The evaluation indicators for soil condition improvement were as follows:thickness of the plough layer and hard pan,soil bulk density,cone index,soil three-phase R values,alkali nitrogen content,crop yield,and economic ben efits.The results showed that subsoiling can sign ificantly improve the soil structure and physical properties.In all subsoiling treatments,the depth of 35 or 40 cm at a 2-year interval was the most significant.The thickness of the plough layer in creased from 13.67 cm before the test to 21.54-23.45 cm in 2018.The thick ness of the hard pan decreased from 17.68 cm before the test to 12.09-12.76 cm in 2018,a decrease of about 40.07%.However,the subsoiling combined presowing tillage practice,that is,rotary cultivation or ploughing,was not significant for soil structure and physical properties.For all subsoiling treatments,the soil bulk density,cone index and soil three-phase R values of the 15-25 cm soil layer were significantly lower compared to single rotary cultivation.Subsoiling was observed to increase the soil alkaline nitrogen and water conte nts.The tillage patter ns that had subsoiling at the depth of 35-40 cm at a 2-year in terval combi ned with rotary cultivation had the highest alkali nitrogen and water contents,which increased by 31.08-34.23%compared with that of the single rotary cultivati on.Subsoiling can sign ifica ntly in crease the yield both of wheat and corn,a

关 键 词：SUBSOILING PERIOD INTERVAL soil properties CROP YIELD Huang-Huai-Hai Plain 

分 类 号：S341[农业科学—作物栽培与耕作技术]