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为探索改良盐碱土新的技术和方法,调查比较了深耕、稻壳深施改良苏打碱土土壤物理性质和增产苜蓿的效果,结果表明:(1)稻壳深施降低土壤容重、提高土壤孔隙度和通透性能、改善三相比的效果明显,而仅仅通过深耕改良苏打碱土壤物理性质效果的持久性差。(2)改土后连续2年,深耕区增产效果不明显,第1年和第2年分别比对照减产0.1%和4.2%,2年平均增产1.7%;稻壳深施区增产效果显著,第1年和第2年分别比对照增产25.4%和33.2%,2年平均增产28.8%。可见,稻壳深施改良碱土,增产效果好,且具有明显的埋存效应,为本区域内的有机资源利用开辟新的途径和方法,应用前景广阔。
In order to explore new techniques and methods for improving saline-alkali soil, the soil physical properties and yield-increasing effect of improved sodic alluvial soil under deep plowing and rice husk were investigated. The results showed that: (1) Rice husk deep application reduced soil bulk density and soil porosity And the permeability, the improvement of the three-phase effect is obvious, and only by deep plowing improved soda ash soil physical properties of persistent poor. (2) After 2 years of continuous improvement, the stimulation effect of deep plowing area is not obvious, 0.1% and 4.2% decrease respectively in the first year and the second year, and 1.7% increase on average in 2 years; The first year and the second year increased by 25.4% and 33.2% respectively compared with the control, and the average yield increased by 28.8% in two years. It can be seen that rice husks improve the production of alkaline earths with good yield enhancement effect and obvious burying effect, opening up new avenues and methods for the utilization of organic resources in the region, and the application prospects are bright.