TY - JOUR
T1 - Benefits and limitations of straw mulching and incorporation on maize yield, water use efficiency, and nitrogen use efficiency
AU - Qin, Xiaoliang
AU - Huang, Tiantian
AU - Lu, Chen
AU - Dang, Pengfei
AU - Zhang, Miaomiao
AU - Guan, Xiao kang
AU - Wen, Peng fei
AU - Wang, Tong Chao
AU - Chen, Yinglong
AU - Siddique, Kadambot H.M.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - Straw mulching and straw incorporation are widely used for conservation tillage as the primary methods of returning straw to the field. However, few studies have investigated the effects of straw mulching and straw incorporation under various agronomic management and environmental and edaphic factors. Here, we conducted a meta-analysis incorporating 112 publications to determine whether straw incorporation and straw mulching had different effects on maize yield, water use efficiency (WUE), and nitrogen use efficiency (NUE) under contrasting soil textures, N application rates, straw returning amounts, and annual average precipitation, temperature, and evaporation. The results showed that straw mulching and straw incorporation significantly increase maize yields, WUE, and NUE. Straw mulching yield had a significant positive correlation with WUE, while straw incorporation yield had significant positive correlations with WUE and NUE. Maize yield and WUE increased and NUE decreased with increasing nitrogen application rate. Straw incorporation increased maize yield and NUE more than straw mulching at low straw returning amounts (< 6000 kg ha−1). In arid and semi-arid areas with < 400 mm average annual precipitation and > 1200 mm evaporation, straw mulching increased maize yield, WUE, and NUE more than straw incorporation. In semi-humid areas (400–600 mm), straw incorporation increased maize yield and NUE more than straw mulching. Straw mulching is more conducive to increasing maize yield and NUE with average annual temperatures < 7 °C, while straw incorporation is more conducive to increasing maize yield, WUE, and NUE with average annual temperatures > 13 °C. Of the three soil textures, the largest weighted response ratio of straw returning on yield and NUE occurred in loam soil with straw incorporation. This study identified the benefits and limitations of straw incorporation and straw mulching on maize yield, NUE, and WUE.
AB - Straw mulching and straw incorporation are widely used for conservation tillage as the primary methods of returning straw to the field. However, few studies have investigated the effects of straw mulching and straw incorporation under various agronomic management and environmental and edaphic factors. Here, we conducted a meta-analysis incorporating 112 publications to determine whether straw incorporation and straw mulching had different effects on maize yield, water use efficiency (WUE), and nitrogen use efficiency (NUE) under contrasting soil textures, N application rates, straw returning amounts, and annual average precipitation, temperature, and evaporation. The results showed that straw mulching and straw incorporation significantly increase maize yields, WUE, and NUE. Straw mulching yield had a significant positive correlation with WUE, while straw incorporation yield had significant positive correlations with WUE and NUE. Maize yield and WUE increased and NUE decreased with increasing nitrogen application rate. Straw incorporation increased maize yield and NUE more than straw mulching at low straw returning amounts (< 6000 kg ha−1). In arid and semi-arid areas with < 400 mm average annual precipitation and > 1200 mm evaporation, straw mulching increased maize yield, WUE, and NUE more than straw incorporation. In semi-humid areas (400–600 mm), straw incorporation increased maize yield and NUE more than straw mulching. Straw mulching is more conducive to increasing maize yield and NUE with average annual temperatures < 7 °C, while straw incorporation is more conducive to increasing maize yield, WUE, and NUE with average annual temperatures > 13 °C. Of the three soil textures, the largest weighted response ratio of straw returning on yield and NUE occurred in loam soil with straw incorporation. This study identified the benefits and limitations of straw incorporation and straw mulching on maize yield, NUE, and WUE.
KW - China
KW - Maize yield
KW - Nitrogen use efficiency
KW - Straw incorporation
KW - Straw mulching
KW - Water use efficiency
UR - http://www.scopus.com/inward/record.url?scp=85113272057&partnerID=8YFLogxK
U2 - 10.1016/j.agwat.2021.107128
DO - 10.1016/j.agwat.2021.107128
M3 - Article
AN - SCOPUS:85113272057
SN - 0378-3774
VL - 256
JO - Agricultural Water Management
JF - Agricultural Water Management
M1 - 107128
ER -