CAJ | 학술논문

通过对若尔盖湿地和草地的退化沙化调查及采样分析,结果表明：在若尔盖湿地和草地退化沙化演变过程中,土壤的有机质含量、养分元素N、P的全量和有效性N、P、K含量呈明显的下降趋势;土壤粘粒、粉砂粒含量不断降低,沙粒含量不断升高,退化为沙地时,土壤粘粒、粉砂粒含量合计不足10%,沙粒含量高达90%以上;土壤的持水和保水能力下降,土壤含水量呈降低的趋势,沙化地土壤0 cm～10 cm含水量仅57.88 g.kg-1,不到湿地土壤含水量的1/10,仅为草地土壤含水量的1/7。
통과대약이개습지화초지적퇴화사화조사급채양분석,결과표명：재약이개습지화초지퇴화사화연변과정중,토양적유궤질함량、양분원소N、P적전량화유효성N、P、K함량정명현적하강추세;토양점립、분사립함량불단강저,사립함량불단승고,퇴화위사지시,토양점립、분사립함량합계불족10%,사립함량고체90%이상;토양적지수화보수능력하강,토양함수량정강저적추세,사화지토양0 cm～10 cm함수량부57.88 g.kg-1,불도습지토양함수량적1/10,부위초지토양함수량적1/7。
Investigation and soil sampling analysis were made of degraded wetland and deserted grassland in Zoigê.The results were as follows：the content of organic matter,total N,P and available N,P,K in soil significantly reduced in the process of Zoigê wetland degradation and grassland desertification;and the content of clay and powder sand in soil continuously declined and the sand content increased;the content of clay and powder sand was less than 10% and the sand content reached more than 90% in deserted grassland;and the water retention ability of soil dropped,the soil moisture reduced.The moisture in the soil of 0 cm~10 cm depth was only 57.88 g·kg-1 in deserted grassland,less than 1/10 of soil moisture in the wetland,and only 1/7 of the soil moisture in the grassland,respectively.