| 1. | Clay contains available nutrient elements .
粘土会有有用的营养元素。 |
| 2. | Crop growth and development requires an adequate supply of available nutrients at the proper time in the plant ' s life cycle
在植物整个生长发育过程中，需要适时供应有效养分。 |
| 3. | The results showed the growth of cunninghamia lanceolota seedlings was improved by the rotation of oryza sativa and cunninghamia lanceolata , and the soil available nutrients increased
结果表明：用水稻等作物与杉木轮作后，杉木苗生长状况改善，土壤有效养分和速效养分增加。 |
| 4. | Soil enzyme activity could be used as the important evaluation index of soil fertiiity . soil enzyme play a very important role in the transformation of organic matter , n , p into available nutrient forms that can be used by plants
土壤酶的活性可以作为评价土壤肥力的重要指标，土壤酶对土壤物质(有机质、氮、磷)转化起着重要作用。 |
| 5. | Species interactions between bloom microalgae and other algae play essential roles in affecting the phytoplankton sequence either by competing for the available nutrient supply or by secreting extracellular organic substances ( allelopathy ) into the environmental medium
根据生态系统中的食物链关系，通过引人赤潮生物的天敌来防治赤潮也是一种治理方法。 |
| 6. | The investigations turned out that with the successive planting of crops the mainly available nutrients accumulated yearly under normal fertilization in the upland fields form yellow soil area , especially the content of p increased obviously
在该地区目前的施肥水平下，旱地长期种植作物后土壤主要有效养分的含量都出现不同程度的增加，其中土壤磷的积累最明显。 |
| 7. | Abstract : by means of pot , field minispot experiments and analysis indoor , the effects of soybean specific fertilizer on soil enzymes activity and available nutrients were investigated in rotation , soybean continuous cropping system , respectively
文摘:采用盆栽、田间小区控制试验及室内分析相结合的方法，研究了施用大豆专用肥对连作、轮作大豆土壤酶活性和有效养分的影响。 |
| 8. | Because the evaporation is great more than rainfall , and the ground water is deep , soil water is always in the step of wane condition and the soil nutrient are also leanness and available nutrients are scantily , which makes the eco - environment of the plateau very fragile
由于蒸发潜势远大于降雨量，而地下水埋藏又很深，致使土壤水分经常处于水分亏缺状态，加之水土流失严重，土壤贫瘠，基础肥力低，有效养分缺乏，生态环境十分恶劣。 |
| 9. | Experiments of artificial rainfall showed that sediment is the main body of total nutrient loss and runoff is the main body of available nutrient loss when erosion is slight , but sediment become the main body of total and available nutrient synchronously while erosion is intense . concentration of nutrient in runoff is most likely to be affected by concentration in topsoil . the higher concentration in topsoil is , the more possible nutrient loss by runoff is
人工降雨实验结果表明，在降雨强度和侵蚀强度不大时，侵蚀泥沙是全量养分流失的主体，地表径流则是速效养分流失的主体；而当在降雨强度和侵蚀强度极为剧烈时，侵蚀泥沙成为全量养分和速效养分二者流失的主要载体；地表径流中的养分含量很大程度上受土壤中养分含量的影响，土壤中养分含量越高，养分径流流失的可能性越大。 |
| 10. | The results showed the soil enzymes activity and available nutrients in soybean continuous cropping could approach or higher than those of conventional fertilizeration after applying soybean specific fertilizer , which indicated soybean specific fertilizer could modulate the deteriorating soil enzymes and nutrients ecological surrondings , therefore it could overcome the soybean drop in production caused by continuous cropping
结果显示施用大豆专用肥后，土壤酶活性和有效养分总体均能达到或高于轮作土壤常规施肥水平，这表明大豆专用肥能调控大豆连作所引起的土壤酶活性和养分恶化，最终使得大豆专用肥能克服大豆连作所引起的大幅度减产。 |
