|覃超1; 郑粉莉1,2; 刘沛峰3; 徐锡蒙1; 吴红艳1; 汪怡珂3
土壤硬度增加了11.4%～127.5%；＜0.25 mm团聚体降低了46.9%～51.6%；＞2 mm团聚体增加了
【Objective】Modifying soil physical properties is an important approach to improving
soil anti-erodibility. As by-product of some industries，corn stalk sap is often discharged as waste. Recent
studies have demonstrated that spraying corn stalk sap in the field may control sheet erosion. However，
little is available in literature regarding effects of corn stalk sap controlling splash erosion and wind erosion.
【Method】In this study，a new soil amendment consisting 95%～97% corn stal k sap and 3%～5%
preservative（sodium benzoate）was tested in a field subjected to artificial rainfalls，winds and in situ
observation to explore its effects of controlling splash，sheet，and wind erosion of loessial soil and their
mechanisms. The experiment was designed to have two treatments for ingredient of the spray（corn stalk sap
and tap water，the same in spraying volume），two treatments for standing time after spraying（7 and 14
d）and two treatments for soil tillage condition（with and without manual plough）. 【Result】Results show
that corn stalk sap was quite effective in controlling water and wind erosion of loessial soil. Under simulated
rainfalls，it reduced splash erosion by 24.7%～78.3%，runoff by 35.3%～45.3% and sheet erosion by
20.9%～34.5%. Under natural rainfalls，the effects varied with rainfall pattern. When the rain was short in
duration and low in intensity its effects reached the highest，with runoff and sheet erosion reduced by 62.1%
and 72.0%. But when the rain was long in duration and high in intensity，it reduced runoff and sheet erosion
by 26.3% and 58.3% and when the rain was short in duration and high in intensity，it did by 41.0% and
69.6%，respectively. Under the same standing time and soil tillage condition，its effect of reducing sediment
yield was higher than that of reducing runoff. Under the condition of 6，8 and 14 m s-1 in wind speed，it
reduced wind erosion by 25.0%～64.6%，31.0%～52.9% and 24.5%～43.2%，respectively，as compared
with those in the control treatments. Manual tillage significantly increased water and wind erosion. Besides
the effects of spraying corn stalk sap on various types of erosion varied with standing time and tillage. By
increasing soil shear strength and soil hardness，promoting formation of soil micro-aggregates，spraying cornstalk sap reduced soil erosion of any types. After spraying corn stalk sap，soil disintegration decreased by
97.4%～98.5%；soil shear strength and soil hardness increased by 98.1%～171.2% and 11.4%～127.5%，
respectively；proportion of soil aggregates with diameter＜0.25 mm decreased by 46.9%～51.6%；and
proportion of soil macro-aggregates with diameter＞2 mm increased by 88.1%～129.7%. 【Conclusion】Corn
stalk sap is proved to be a practical soil amendment for control of water and wind erosion of the soil. It is，
therefore，suggested that spraying of corn stalk sap be finished without suspending，so as to avoid any further
human disturbance of the soil sprayed with corn stalk sap.
覃超,郑粉莉,刘沛峰,等. 玉米秸秆汁土壤改良剂对黄绵土抗侵蚀能力的影响[J]. 土壤学报,2017,54(2):367-378.
覃超,et al."玉米秸秆汁土壤改良剂对黄绵土抗侵蚀能力的影响".土壤学报 54.2(2017):367-378.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.