干旱地区农业研究
榦旱地區農業研究
간한지구농업연구
AGRICULTURAL RESEARCH IN THE ARID AREAS
2013年
6期
108-114
,共7页
碱化土壤%脱硫石膏%土壤团聚体%有机无机复合体
堿化土壤%脫硫石膏%土壤糰聚體%有機無機複閤體
감화토양%탈류석고%토양단취체%유궤무궤복합체
sodic soil%flue gas desulphurization gypsum%soil aggregates%organic-inorganic compound particles
为探明脱硫石膏对碱化土壤物理结构性质的影响，采用田间试验的方法，研究了不同脱硫石膏施用量对碱化土壤团聚数量、大小、稳定性及有机无机复合体组分的影响。结果表明，耕作层施用脱硫石膏4a后，与CK相比，机械稳定性团聚体（DR0．25）含量提高22．69％～45．29％、水稳定性团聚体（WR0．25）数量提高126．59％～304．70％、团粒平均重量直径（MWD）值提高2．63％～10．46％，团粒几何平均直径（GMD）值提高7．98％～19．01％，且土壤团聚体破坏率（PAD）和不稳定团粒指数（ELT）和分形维数D值均随脱硫石膏用量增加而明显降低。同时，脱硫石膏的施用显著降低了水分散复合体（G0）含量、提高了钠质分散复合体（G1）含量。总之，脱硫石膏施用主要通过Ca2＋直接参与土壤有机无机复合体的形成，而显著改良碱化土壤的团聚体组成与稳定性状。
為探明脫硫石膏對堿化土壤物理結構性質的影響，採用田間試驗的方法，研究瞭不同脫硫石膏施用量對堿化土壤糰聚數量、大小、穩定性及有機無機複閤體組分的影響。結果錶明，耕作層施用脫硫石膏4a後，與CK相比，機械穩定性糰聚體（DR0．25）含量提高22．69％～45．29％、水穩定性糰聚體（WR0．25）數量提高126．59％～304．70％、糰粒平均重量直徑（MWD）值提高2．63％～10．46％，糰粒幾何平均直徑（GMD）值提高7．98％～19．01％，且土壤糰聚體破壞率（PAD）和不穩定糰粒指數（ELT）和分形維數D值均隨脫硫石膏用量增加而明顯降低。同時，脫硫石膏的施用顯著降低瞭水分散複閤體（G0）含量、提高瞭鈉質分散複閤體（G1）含量。總之，脫硫石膏施用主要通過Ca2＋直接參與土壤有機無機複閤體的形成，而顯著改良堿化土壤的糰聚體組成與穩定性狀。
위탐명탈류석고대감화토양물리결구성질적영향，채용전간시험적방법，연구료불동탈류석고시용량대감화토양단취수량、대소、은정성급유궤무궤복합체조분적영향。결과표명，경작층시용탈류석고4a후，여CK상비，궤계은정성단취체（DR0．25）함량제고22．69％～45．29％、수은정성단취체（WR0．25）수량제고126．59％～304．70％、단립평균중량직경（MWD）치제고2．63％～10．46％，단립궤하평균직경（GMD）치제고7．98％～19．01％，차토양단취체파배솔（PAD）화불은정단립지수（ELT）화분형유수D치균수탈류석고용량증가이명현강저。동시，탈류석고적시용현저강저료수분산복합체（G0）함량、제고료납질분산복합체（G1）함량。총지，탈류석고시용주요통과Ca2＋직접삼여토양유궤무궤복합체적형성，이현저개량감화토양적단취체조성여은정성상。
To investigate the influence of flue gas desulphurization gypsum(FGDG)on the physical properties of sodic soil,a field experiment was conducted to study the effects of the different dosage of FGDG on the aggregation and stability of soil aggregates .The results indicated that compared to the control,content of aggregates above 0 .25 mm by dry and wet sieving (DR0.25 and WR0.25),aggregate mean mass diameter(MWD),and geometric mean diameter (GMD)in 0~20 cm sodic soil layer increased by the range of 2 .69%~45 .29%,126 .59~304 .70%,2 .63%~10.46%,and 7.98%~19.01%,respectively,by adding FGDP.Meanwhile,DR0.25,MWD,and GMD increased significantly with the increasing FGDG rate,and the fractal dimensions of FGDG treatment were significantly lower than the control in 0~20 cm soil layer .In 0~20 cm soil layer,the aggregate destruction (PAD)and unstable aggregate in-dex (ELT)were significantly reduced as FGDG rate increased .In addition,concentration of Ca2+bridges compound par-ticles (G1 )was increased for amelioration with FGDG,which may be associated with the promotion effect of organic molecules (OM)attached to clay (Cl)and polyvalent cations (P)(Cl-P-OM).Futher,concentration of the water solu-bility composite particles (G0)in all FGDG treatments was significantly lower than the control .It is concluded that the FGDG contributed to the formation of organic-inorganic compound particles,which significantly improved the content and stability of aggregates in sodic soil .
