| 1. | The store of nutrients in the soil which is available to plants is an important constraint upon plant productivity .
土壤中植物有效养分的储存对于植物生长量是一个重要的制约因素。 |
| 2. | Effect of combined k - zn - mn fertilizer on the efficiency nutrient in soil
锰配施对土壤有效养分含量的影响研究 |
| 3. | Investigation on avaliable nutrients of ' lubeidongzao ' jujube orchard soil in zhanhua area , shandong province
沾化县冬枣园的土壤有效养分状况 |
| 4. | 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。 |
| 5. | 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。 |
| 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. | The result showed that organo - inorgano - mixed fertilizer could increase the quantity of availability , strengthen the activity of proteinase , sucrase , urase and peroxidase in the sugarcane roots , and increase the sugarcane yield and sugar content
结果表明，有机无机肥料配施，可提高土壤有效养分的含量，激活土壤蔗糖酶、脲酶、蛋白酶、过氧化物酶的活性，促进甘蔗生长与蔗糖分的累积，对甘蔗增产增糖有积极的作用。 |
| 9. | 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。 |
| 10. | The model of rice ecological balanced fertilization is based on the conservation of mass and the relation of transmuting of the availability nutrition , the balanced fertilization is the best combination of fertilizer input which can meet the needs of high quantity , low investment , none - pollution , and so on
生态平衡施肥模型是建立在质量守恒定律和有效养分转化关系的基础上，生态型肥料是同时满足高产、低投、没有污染等多目标的最佳肥料投入组合。 |
