CAJ | 학술논문

以采自中国科学院安塞水土保持综合试验站基地的粉砂质黄绵土壤为试验用土，研究秸秆不同处理方式对黄绵土结构的影响。结果表明，(1)粉碎秸秆与硫酸钙配施处理能显著增加黄绵土水稳性团聚体，各评价指标与对照组(裸土)差异显著(P<0．05)，同时该处理降低了土壤结构的分形维数，有效提高土壤结构稳定性；(2)粉碎氨化秸秆以及与硫酸钙改良剂混合施用对提高黄绵土水稳性团聚体含量有一定的迟效性；(3)在整个培养期内，长秸秆改良土壤结构作用缓慢，单施硫酸钙对黄绵土结构无明显改良作用，土壤结构分形维数与团聚体评价指标大于0．25的土壤团聚体结构含量(R0．25)、平均质量直径(WMD)、平均几何直径(GMD)各值均呈极显著负相关关系(P<0．01)。总之，不同处理方式的秸秆施入土壤后，对原状土的扰动方式不尽相同；采用团聚体分形维数可定量描述土壤结构的动态演变过程。
이채자중국과학원안새수토보지종합시험참기지적분사질황면토양위시험용토，연구갈간불동처리방식대황면토결구적영향。결과표명，(1)분쇄갈간여류산개배시처리능현저증가황면토수은성단취체，각평개지표여대조조(라토)차이현저(P<0．05)，동시해처리강저료토양결구적분형유수，유효제고토양결구은정성；(2)분쇄안화갈간이급여류산개개량제혼합시용대제고황면토수은성단취체함량유일정적지효성；(3)재정개배양기내，장갈간개량토양결구작용완만，단시류산개대황면토결구무명현개량작용，토양결구분형유수여단취체평개지표대우0．25적토양단취체결구함량(R0．25)、평균질량직경(WMD)、평균궤하직경(GMD)각치균정겁현저부상관관계(P<0．01)。총지，불동처리방식적갈간시입토양후，대원상토적우동방식불진상동；채용단취체분형유수가정량묘술토양결구적동태연변과정。
Selecting the soil from Ansai soil and Water Conservation Comprehensive Test Station of the Academy of Sciences of China as the test soil, this paper studied the effects of different application approaches with straws on the structure of loessal soil. Results showed that: (1) Application of the powdered straw blended calcium sulfate could significantly increase the wa-terstable aggregates and the values of evaluation indexes >0. 25 mm water stable aggregates ( R0. 25 ) , mean weight diameter ( WMD) and geometric mean diameter ( GMD) , respectively, were significantly higher than those of the control group CK’s ( P< 0. 05), and at the same time, soil fractal dimension was reduced and soil structure stability was improved; (2) The soil with powdered and ammoniated straw group had slow efficiency for improving soil aggregates of loess soil; ( 3 ) In the whole training period, adding only long straw or calcium sulfate to soil had no obvious improvement for soil aggregates, and the soil structure fractal dimension as well as the aggregate evaluation index had significantly negative correlation (P < 0. 01, respec-tively) . In conclusion, different straw incorporation had different influence on soil aggregates, and using the soil structure fractal dimension could quantitatively describe the dynamic changes of soil structure points.