中国农业科学 ›› 2021, Vol. 54 ›› Issue (8): 1702-1714.doi: 10.3864/j.issn.0578-1752.2021.08.010
宋鸽1(),史东梅1(),蒋光毅2,江娜1,叶青1,张健乐1
收稿日期:
2020-06-26
接受日期:
2020-10-14
出版日期:
2021-04-16
发布日期:
2021-04-25
通讯作者:
史东梅
作者简介:
宋鸽,E-mail: 基金资助:
SONG Ge1(),SHI DongMei1(),JIANG GuangYi2,JIANG Na1,YE Qing1,ZHANG JianLe1
Received:
2020-06-26
Accepted:
2020-10-14
Online:
2021-04-16
Published:
2021-04-25
Contact:
DongMei SHI
摘要:
【目的】紫色土坡耕地土壤侵蚀严重,研究土壤管理措施对不同侵蚀程度坡耕地耕层侵蚀恢复作用,为紫色土坡耕地耕层质量调控和坡耕地持续利用提供理论及实践依据。【方法】采用单因素方差分析(One-way ANOVA)检验各指标的差异显著性,研究不施肥(CK)、施化肥(F)、施生物炭+化肥(BF)3种土壤管理措施对侵蚀0 cm(S-0)、侵蚀5 cm(S-5)、侵蚀10 cm(S-10)、侵蚀15 cm(S-15)、侵蚀20 cm(S-20) 5个不同侵蚀程度坡耕地耕层土壤属性的恢复作用。【结果】(1)随侵蚀程度增加,土壤砂粒含量由38.1%—42.4%逐渐增至44.2%—46.4%,土壤黏粒含量由12.6%—14.8%逐渐减少至9.6%—11.0%;与S-0、S-5、S-10相比,S-15、S-20土壤容重显著增大;S-10侵蚀程度下,土壤抗剪强度最大,在8.71—9.56 kg·cm-2之间;F、BF处理下S-15侵蚀程度的土壤稳定入渗率、平均入渗率降幅均最大。(2)不同管理措施下坡耕地耕层土壤属性差异显著,BF处理下土壤砂粒含量小、黏粒含量最大,0—10 cm、10—20 cm土层土壤容重显著低于CK(P<0.05),土壤总孔隙度、毛管孔隙度均显著高于CK、F处理;BF处理下土壤初始入渗率、稳定入渗率、平均入渗率均最大,CK处理最小;与CK处理相比,BF处理土壤抗剪强度显著增大。(3)随侵蚀程度增加,土壤可蚀性K值显著下降,与S-0相比,S-20侵蚀程度下土壤可蚀性K值下降0.1960%—0.2192%;BF处理下土壤可蚀性K值最大,F处理次之,CK最小;S-10侵蚀程度下F、BF处理的K值均较CK增加幅度最大,分别增加0.0684%、0.1404%。【结论】施加生物炭+化肥在改善土壤物质组成、结构特征、提高土壤蓄渗性能等方面较单施化肥效果更为显著,可有效减轻紫色土坡耕地耕层土壤侵蚀,对侵蚀10 cm条件下的坡耕地耕作层(0—20 cm)土壤的改良效果最佳。
宋鸽,史东梅,蒋光毅,江娜,叶青,张健乐. 土壤管理措施对坡耕地侵蚀退化耕层的恢复作用[J]. 中国农业科学, 2021, 54(8): 1702-1714.
SONG Ge,SHI DongMei,JIANG GuangYi,JIANG Na,YE Qing,ZHANG JianLe. Effects of Different Fertilization Methods on Restoration of Eroded and Degraded Cultivated-Layer in Slope Farmland[J]. Scientia Agricultura Sinica, 2021, 54(8): 1702-1714.
表2
不同土壤管理措施及侵蚀程度下坡耕地耕层土壤可蚀性K值变化特征"
管理措施 Management measure | 土层深度 Soil depth (cm) | 侵蚀程度 Erosion degree | ||||
---|---|---|---|---|---|---|
S-0 | S-5 | S-10 | S-15 | S-20 | ||
CK | 0-10 | 0.04832Ca | 0.04829Bb | 0.04826Cc | 0.04824Cd | 0.04822Ce |
10-20 | 0.04834Ca | 0.04832Cb | 0.04828Cc | 0.04826Cd | 0.04824Ce | |
F | 0-10 | 0.04834Ba | 0.04832Ab | 0.04829Bc | 0.04827Bd | 0.04825Be |
10-20 | 0.04836Ba | 0.04834Bb | 0.04832Bc | 0.04829Bd | 0.04826Be | |
BF | 0-10 | 0.04836Aa | 0.04835Ab | 0.04833Ac | 0.04829Ad | 0.04827Ae |
10-20 | 0.04839Aa | 0.04837Aa | 0.04835Ab | 0.04831Ac | 0.04829Ad |
表3
土壤属性指标与土壤可蚀性K值相关系数"
管理措施 Management measure | 砂粒 Sand | 粉粒 Silt | 黏粒 Clay | 容重 Bulk density | 总孔隙度 Total porosity | 毛管孔隙度 Capillary porosity | 土壤抗剪强度 Soil shearing strength | 初始入渗率 Initial infiltration rate | 稳定入渗率 Infiltration capacity | 平均入渗率 Average infiltration rate | 饱和导水率 Hydraulic conductivity |
---|---|---|---|---|---|---|---|---|---|---|---|
CK | -0.997** | 0.996** | 0.998** | -0.982** | 0.992** | 0.996** | 0.363 | 0.995** | 0.988** | 0.990** | 0.993** |
F | -0.992** | 0.991** | 0.992** | -0.965** | 0.992** | 0.988** | 0.569 | 0.981** | 0.977** | 0.980** | 0.976** |
BF | -0.996** | 0.997** | 0.996** | -0.996** | 0.993** | 0.994** | 0.534 | 0.984** | 0.973** | 0.980** | 0.983** |
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