养分循环

不同连栽代次桉树人工林的养分循环

Nutrient Cycle of Eucalyptus Plantations with Different Continuous - Planting Rotations

耕作制度对紫色土养分循环的影响

Effects of cultivation system on nutrient cycle of purple soil

水土保持乔灌混交林N、P养分循环的研究

A Study on N and P Cycling in Soil and Water Conservation Forest Composed of P.massoniana and Shrubs

细根分解是陆地生态系统C和养分循环的重要环节。主要包括淋溶和破碎等物理过程和以生物作用为主的化学过程。

Decomposition of fine roots is one of the major pathways of carbon and nutrient cycling in terrestrial ecosystems .

红壤稻田系统养分循环与C、N转化过程

Nutritional Cycling and Transformation Processes of Carbon and Nitrogen in Rice Cropping System of Red Soil Region of China

因此，研究土壤动物对细根生理生态过程的影响对于认识森林生态系统C和养分循环具有重要意义。

Therefore research on the effects of soil fauna on fine root eco-physiological processes is important in understanding C and nutrient cycling in forest ecosystems .

树木细根的生产和周转对森林生态系统C和养分循环具有重要影响。

Fine root turnover is a major pathway for carbon and nutrient cycling in terrestrial ecosystems and may be sensitive to many global change factors .

研究了在养分循环再利用的基础上采取不同施肥制度下作物养分移出量，并结合施肥量计算出土壤中N、P、K养分收支。

The quantity of crop nutrients transferred from the system , and the nutrient budget of N , P and K in soil were studied .

循环再利用Deming循环严重侵蚀红壤不同治理模式群落N、P养分循环研究

Study on N and P Cycling of P. massoniana Community Under Different Improving Patterns in Severely Eroded Red Soil

混交林和纯林群落中林下植被细根在群落细根N、P养分循环中占有重要地位，而杉木和观光木<0.5mm径级细根则是其细根养分循环功能的主体。

Fine roots of undergrowth played an important role in nutrient cycling of fine roots of forest community . Roots < 0.5 mm in diameter was the major body in nutrient cycling of fine roots .

在保持养分循环利用基础上根据土壤肥力适当施用化肥，可满足丰产作物的养分需求和平衡土壤养分收支，不致发生大量过剩N进入环境。

The use of recycled nutrients with an appropriate use of fertilizers according to the soil fertility could produce higher crop yields , balance soil nutrient budget , and not cause surplus nutrients to emit into environment .

这表明放牧可以加速养分循环，并且从植被δ15N同位素水平也可以反映出来。

Which indicated the grazing accelerated nutrients cycles and it was reflected from δ 15N level of vegetation .

农田系统有机养分循环利用能进一步提高水稻产量，但产量增益随NPK配施程度提高而降低。

Organic nutrient recycling use could increase rice yield further , but the yielding benefit reduced with the increase of NPK combinative application ;

保持农业系统养分循环再利用可以缓解K收支赤字，而配合适量K肥的施用可以实现作物高产，平衡土壤中K收支。

The reutilization of recycled nutrients in farming system could mitigate the deficit of soil potassium budget , and such reutilization assorted with appropriate amount of potassium fertilization could not only produce high crop yield , but also balance soil potassium budget .

而土壤库中养分循环速率最高是N（3.1%），最低是Mg（0.6%），相应的周转期分别为32.3年和166.7年。

Of the nutrient cycling rates in the soil pool N was the highest ( 3.1 % ) and Mg was the lowest ( 0 6 % ), and N periodic cycling time was 32 3 years and that of Mg was 166 7 years .

以红壤性稻田土壤为对象，采用田间试验方法，研究了在不同化肥配施条件下，有机养分循环利用对土壤微生物量C（MB-C）、N（MB-N）、P（MB-P）的影响。

Based on a 14-year long term experiment , the effects of fertilization systems and nutrient recycling on microbial biomass C , N and P in a reddish paddy soil were studied .

通过有机养分循环利用可大幅度提高微生物对N素和P素的固持量，提高土壤MB-C、MB-N、MB-P占土壤全量C、N、P的比例。

Therefore , the recycling use of organic nutrient improved the rate of soil MB-C to soil total C , MB-N to total N and MB-P to total P , and also enhanced the fixation of microbial to N and P nutrients .

养分循环再利用的作物增产效益在试验的10a中有着逐年增长的趋势，表明以堆肥形式循环回田养分的作物增产作用有着明显的残效叠加效应。

During the ten years of experiment , the effect of recycled nutrients on crop yields appeared an increasing trend , implying the existence of an accumulative effect from successive application of recycled compost on crop yields .

定量分析小叶锦鸡儿（Caraganamicrophylla）灌丛在浑善达克沙地不同生境条件下的分布格局，有助于理解植被与土壤养分循环之间的关系和合理制定退化沙地的恢复对策。

They can provide with useful information about the relationship between vegetation and nutrient cycling as well as with powerful measure of restoration of the degraded sand land to quantify the spatial pattern of Caragana microphylla shrub communities in the various habitats .

研究植物体内矿质养分循环的方法

A Method for Study Nutrient Cycling and Recycling in Higher Plants

红壤旱坡地农田生态系统养分循环和平衡

Nutrient cycling and balance of sloping upland ecosystems on red soil

不同栽植代数杉木林养分循环的比较研究

Comparison on nutrient cycling in different generation plantations of Chinese fir

保山市农田生态系统养分循环与平衡研究

Nutrient Cycling and Balance of Agro-ecosystem in Baoshan , Yunnan Province

受干扰的生态系统Ⅰ.柞蚕林的养分循环

A disturbed ecosystem ⅰ . Nutrient cycling in tussah-feeding oak plantation

稻田养分循环利用模式的研究

A study on nutrient cycling and utilizing patterns in paddy field

农田土壤养分库的养分循环与养分平衡。

Nutrients cycling and balance of agricultural soil nutrients pool .

红壤农业生态系统养分循环、平衡和调控研究

Nutrient cycling , balance and regulation in red soil agroecosystem

森林生态系统养分循环特征参数研究

On the Characteristic Parameters of Nutrient Cycling in Forest Ecosystem

对雪盖生态系统的养分循环过程的研究报道增加；

The research reports on nutrient circulation processes in snow ecosystem increased ;

农桐间作生态系统养分循环的研究

Study on nutrients cycling in a intercropping system of Paulownia and wheat