At present, in formulated fertilization the balanced fertilization method and soil fertility index method are widely utilized at home and abroad.
平衡施肥法和土壤肥力指标法是目前国内外普遍采用的两种测土配方施肥方法。
Through field investigation and soil fertility index analysis, causes and mechanism of fertility degradation of black soil in the Songliao Plain were explored.
通过田间调查和土壤肥力指标分析，探讨了松辽平原玉米带黑土肥力退化的原因和机理。
Results showed that the Integrated Fertility Index (IFI) of orchard soil in red earth regions of Guangxi were between 0.17 to 0.25 and belong to mid-low level.
结果表明，广西红壤果园土壤肥力综合指标值(ifi)在0 17 ~ 0 25之间，果园土壤肥力属中下水平。
Soil microaggregates can influence the soil physical, chemical and biological properties and may be used as an overall index for evaluating the fertility level of soil.
土壤微团聚体具有影响土壤理化生物性质多方面的作用，可能作为评价土壤肥力水平的综合指标。
So enzyme activity could be used as an index for evaluation of tidal flat soil fertility.
因此，土壤酶活性可以作为该土壤肥力的指标之一。
There were closely relations between the activity of invertase and main soil nutrients, that can be the index of soil fertility.
土壤转化酶活性与草地主要养分关系密切，它可作为土壤肥力指标。
So enzyme activities could be used as an index for soil fertility evaluation of wetlands covered with different vegetation in Yellow River Delta.
三种酶可以作为评价黄河三角洲冲积平原湿地土壤肥力的指标。
The results showed that, (1) the sustainable index of soil fertility was affected by different treatments of fertilizer application.
结果表明：（1）不同施肥处理对土壤肥力可持续性指数影响不同；
There was significant and remarkably significant positive correlation between soil enzyme activities and most of chemical properties. Soil enzyme activity could be index to monitor soil fertility.
土壤酶活性与土壤大多数化学性质呈显著或极显著正相关，反映出土壤酶活性可在一定程度上表征土壤肥力水平的高低；
Path analysis was studied about 141 accessions involving pollen fertility, anther dehiscence index, embryo sac fertility and seed setting rate.
对141份野生稻的花粉育性、裂药指数、胚囊育性和结实率进行通径分析。
Organic index is higher than standard level of fertility of sediment.
有机指数均高于底泥肥污染标准。
Index system to evaluate fertility safety includes positive indexes and negative indexes.
测度生育安全的指标体系包括正向指标和负向指标。
Based on analysis of the physical and chemical properties of soil samples collected from Henan tobacco plantation area, the index system of soil fertility adaptability of tobacco was established.
本研究在分析河南省烤烟种植区各项肥力指标的基础上，建立了烤烟土壤肥力适宜性评价指标体系。
Based on analysis of the physical and chemical properties of soil samples collected from Henan tobacco plantation area, the index system of soil fertility adaptability of tobacco was established.
本研究在分析河南省烤烟种植区各项肥力指标的基础上，建立了烤烟土壤肥力适宜性评价指标体系。
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