摘要
为探索秸秆深埋和硫酸铝改良剂配施交互作用对苏打盐碱地水盐运移的影响,在通辽市科尔沁左翼中旗开展覆膜滴灌下不同硫酸铝用量与秸秆深埋的田间试验,以甜菜为指示作物,常规处理为对照(CK),在有无秸秆深埋(A、B)的条件下分别设置4水平硫酸铝添加量(30、60、90、120 g/m^(2)),揭示硫酸铝用量、秸秆深埋与土壤含水率、盐分的相关关系,提出覆膜滴灌及秸秆深埋下适宜的硫酸铝用量。结果显示,未添加秸秆处理中B3处理0~50 cm土体平均含水率最高(23.8%),比CK高8.2%,且平均含盐量最低(1.69 g/kg),比CK低12.6%;添加秸秆处理中A3处理0~50 cm土体平均含水率最高(26.6%),比B3处理高2.8%,平均含盐量也最低(1.57 g/kg),比B3处理低19%,且平均积盐率最低,比B3处理降低7.6%;A3处理在10~20和20~30 cm处土壤含水率均显著高于B3处理(P<0.05),在0~10和20~30 cm处土壤含盐量较B3处理显著降低(P<0.05);A3处理0~30 cm各土层均有脱盐趋势,达到显著水平(P<0.05),平均脱盐率11.5%;硫酸铝和秸秆深埋交互作用与土壤含水率呈极显著正相关(0.808),与土壤含盐量呈显著负相关(-0.564)。秸秆深埋和硫酸铝改良剂综合作用可有效降低土壤pH值0.53~0.94,缓解土壤碱化度20.5%~21.9%。覆膜滴灌及秸秆深埋下硫酸铝用量在72~104 g/m^(2)为适宜当地的推荐用量。研究结果可为西辽河平原地区盐碱土壤改良提供理论依据。
In order to explore the effects of straw deep burying and aluminum sulfate modification combination on water and salt transport in soda saline-alkali soil,a field experiment was conducted in Kezuozhong Qi,Tongliao City,with beet as the indicator crop and the conventional treatment(CK)as the control.Four levels of aluminum sulfate supplemental levels(30,60,90,120 g/m^(2))were set up respectively under the condition of straw deep burial(A)or no straw(B),to reveal the relationship between aluminum sulfate dosage,straw deep burial and soil moisture content and salinity,and propose the appropriate aluminum sulfate dosage under mulched film drip irrigation and straw deep burial.The results showed that the average moisture content of 0-50 cm soil of B3 treatment was the highest(23.8%),which was 8.2%higher than that of CK,and the average salt content of B3 treatment was the lowest(1.69 g/kg),which was 12.6%lower than that of CK.In addition to straw,the average moisture content of 0-50 cm soil in A3 treatment was the highest(26.6%),which was 2.8%higher than that in B3 treatment,and the average salt content was the lowest(1.57 g/kg),which was 19%lower than that in B3 treatment,and the average salt content was the lowest,which was 7.6%lower than that in B3 treatment.The soil moisture content at 10-20 and 20-30 cm of A3 treatment was significantly higher than that in B3 treatment(P<0.05),and the soil salt content at 0-10 and 20-30 cm was significantly lower than that in B3 treatment(P<0.05).In the A3 treatment,the desalting trend of 0-30 cm soil layer was significant(P<0.05),and the average desalting rate was 11.5%.The double effects of aluminum sulfate and straw were positively correlated with soil moisture content(0.808),and negatively correlated with soil salt content(-0.564).The combined effects of straw and aluminum sulfate conditioner could effectively reduce soil pH value by 0.53-0.94 and alleviate soil alkalinity by 20.5%-21.9%.72-104 g/m^(2) of aluminum sulfate under mulching drip irrigation and straw buried deep wa
作者
陈希
杨树青
温晓雨
郭富强
付娆
马卫华
刘红霞
CHEN Xi;YANG Shu-qing;WEN Xiao-yu;GUO Fu-qiang;FU Rao;MA Wei-hua;LIU Hong-xia(Inner Mongolia Agricultural University,Inner Mongolia Autonomous Region,Hohhot Inner Mongolia 010018;Inner Mongolia Hengyuan Water Conservancy Engineering Co.,Ltd.,Hohhot Inner Mongolia 010010;Agriculture and Animal Husbandry Ecology and Resource Protection Center of Inner Mongolia Autonomous Region,Hohhot Inner Mongolia 010010)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2024年第1期60-69,共10页
Soil and Fertilizer Sciences in China
关键词
覆膜滴灌
硫酸铝
秸秆深埋
苏打盐碱土
水盐运移
film-covered drip irrigation
aluminum sulfate
straw deep-buried
soda saline-alkali soil
water salt transport
