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【目的】分析吉尔吉斯斯坦共和国(以下简称吉国)费尔干纳谷地种植苜蓿对土壤肥力的影响。【方法】收集文献资料及实地调研分析。【结果】费尔干纳谷地具有种植紫花苜蓿得天独厚的条件,每年可刈割4~5茬,鲜草产量在75 t/hm2以上,苜蓿刈割后还田生物量(干重)约84×103~201×103kg/hm2,总氮含量达300~400 kg/hm2,耕层土壤孔隙度增加到54.1%,通气孔隙增加到15.4%,且土壤粒径>0.25 mm的水稳性团聚体的含量随苜蓿生长年限的增加而递增。【结论】种植苜蓿改善了费尔干纳谷地的土壤理化特性,是提高土壤肥力的有效途径,为费尔干纳谷地发展苜蓿产业化提供有力的理论依据。
【Objective】 The objective of this study was to analyze the effects of planting alfalfa on soil fertility in the Fergana valley in the Kyrgyz Republic (hereinafter referred to as Kyrgyzstan). 【Methods】 Collecting literature and field investigation and analysis. 【Result】 The results showed that the Fergana valley had the unique conditions of planting alfalfa. The annual yield of alfalfa was 4 ~ 5 months, the yield of fresh grass was above 75 t / hm2, and the biomass (dry weight) of alfalfa was about 84 × 103 ~ 201 × 103kg / hm2, total nitrogen content of 300 ~ 400 kg / hm2, topsoil porosity increased to 54.1%, aeration porosity increased to 15.4%, and soil particle size> 0.25 mm Content increased with the increase of alfalfa growth years. 【Conclusion】 The planted alfalfa improved soil physical and chemical properties in the Fergana valley, which was an effective way to improve soil fertility and provided a strong theoretical basis for the development of alfalfa industrialization in the Fergana valley.