有机质、水解氮和速效钾的空间变异主要是由结构性因素引起的，速效磷的空间变异是由随机因素引起的。
The spatial variability of organic matter, available N, and available K was mainly caused by structural factors and that of available P was primarily caused by random factors.
且土壤有机质、全氮、酸水解性总氮、氨基酸态氮和碱解氮含量按照石漠化程度的由轻度到极强度而呈递减趋势，但土壤其他氮素含量并未表现相同的变异规律。
Compared with Karst no-Rocky Desertification soil, the content of soil Organic Matter and Nitrogen in various degrees of Karst Rocky Desertification shows a tendency to drop suddenly.
398中性蛋白酶3种食品级内切蛋白酶对牦牛血红蛋白进行酶解，以水解度及三氯乙酸可溶性氮为评价指标，采用酶解-活性炭法对水解液进行脱色，筛选出AS1。
398 to hydrolysis yak hemoglobin by degree of hydrolysis and TCA-NSI as the evaluation index, and this experiment adopts hydrolysis-activated carbon method to decolourization, and neutrase AS1.
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