Influence of straw incorporation on soil water utilization and summer maize productivity: A five-year field study on the Loess Plateau of China

Yue Li, Hao Chen, Hao Feng, Dong, Qin’ge, Wenjie Wu, Yufeng Zou, Henry Wai Chau and Kadambot H.M. Siddique

Agricultural Water Management, 2020, vol. 233, issue C

Abstract: Soil water is a major limitation to high crop production on the Loess Plateau of China. Straw incorporation is often suggested to promote soil water retention and grain production. Despite the rising number of studies on straw application to soil, the demonstrated merits for straw with lower C: N ratios and varying lengths remain unknown. A five-year field experiment was conducted to explore the effect of ammoniated long or short straw incorporated into the soil on soil water storage (SWS), leaf area index (LAI), intercepted photosynthetically active radiation (PARi), aboveground biomass, evapotranspiration (ET), grain yield, and water use efficiency (WUE). The three treatments were: (i) control (CK: no straw), (ii) ammoniated long straw (50 mm) incorporated into the soil (ALSI), and (iii) ammoniated powdered straw (1 mm) incorporated into the soil (APSI). Compared to the CK plots, the APSI plots increased maize SWS and soil available water (SAW) by 0.2–5.1 % and 1.2–5.7 %, respectively, across the five cropping seasons, and had higher WUE and lower ET and evapotranspiration rate (ETR). The coefficients of variation (CV)—indicating the stability of aboveground biomass, grain yield, and harvest index (HI) in the three treatments across five growing seasons—were ranked as follows: APSI < ALSI < CK. The ammoniated powdered straw incorporated into the soil improved soil water utilization (i.e., conserved more water) and increased maize grain production better than the other two treatments in the rainfed region of the Loess Plateau of China.

Keywords: Straw incorporation; Summer maize yield; WUE; Soil water utilization; Novel cropping system (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0378377419320128
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:233:y:2020:i:c:s0378377419320128

DOI: 10.1016/j.agwat.2020.106106

Access Statistics for this article

Agricultural Water Management is currently edited by B.E. Clothier, W. Dierickx, J. Oster and D. Wichelns

More articles in Agricultural Water Management from Elsevier
Bibliographic data for series maintained by Catherine Liu ().