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土壤速效p
相关语句
  soil available p
    Rhizosphere soil available P contents are lower than bulk soil P, but rhizosphere soil available P contents are higher with rising temperature,
    根际土壤速效 P含量比土体速效磷低 ,2 8℃温度时根际土壤速效磷量较高。
短句来源
    Soil available P exhibited a positive correlation with arbuscular colonization of Salvia miltiorrhiza and vesicular colonization of Dioscorea opposite,while a negative correlation with spore density of Platycodon grandiflorus and vesicular colonization of Atractylodes macrocephala;
    土壤速效P与丹参丛枝定殖率、麻山药泡囊定殖率呈显著正相关,与桔梗孢子密度、白术泡囊定殖率呈显著负相关。
短句来源
  “土壤速效p”译为未确定词的双语例句
    available P content in tilth layer was mainly influenced by chemical fertilizer;
    耕层土壤速效 P含量主要与化肥施用量有关 ;
短句来源
    Nutrients and dissolved oxygen in paddy water and rapidly available nutrients in soil increased,but after maturing stage,compared to basal fertility,rapidly available P and K decreased.
    水体营养物质和溶解氧增大 ; 土壤速效养分有一定提高 ,但成熟后土壤速效P、速效K较基础肥力有一定降低 ;
短句来源
    The results showed that applying bio-organic fertilizer could decrease the bulk density of soil obviously,it also could increase soil porosity,urease and invertase activity,the hydrolyzable N content,the available P content and the available K content in soil at the same time; and the promoting effects were different with different fertilizer application and stage.
    试验结果表明:生物有机肥处理能明显降低土壤容重; 同时,生物有机肥处理能明显提高土壤孔隙度、土壤脲酶活性、土壤转化酶活性、土壤速效N含量、土壤速效P含量和土壤速效K含量,其促进效应因生物有机肥用量和生长期的不同而异。
短句来源
    Applying P fertilizer could improve the content of available P,but applying 135kgK2O per hectare per year did not yet meet the high production need of two croppings in a season. It is therefore necessary to enlarge K fertilizer rate suitably.
    凡施肥处理土壤有机质含量都有所提高,施P处理土壤速效P含量提高幅度较大,每年每公顷施135kg K2O尚不能满足一年两季作物的高产需求,应适当提高K肥用量。
短句来源
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  soil available p
Surface soil available P under tree canopies was 34-50% higher than the corresponding soil away from canopies.
      
Phosphorus-based manure or compost application resulted in similar grain yields to those for N-based treatments but had significantly less soil available P level after 4 yr of application.
      
Although differences were not statistically significant, soil available P concentration tended to increase at early stages of liming for both plantations.
      
However, at the same levels of soil available P and K, field-grown tithonia consistently produced lower leaf P and K concentrations than that grown in hedges.
      
We quantified inputs from the atmosphere, dissolved and particulate-bound losses, throughfall and litterfall fluxes, standing crop litter and soil available P pools.
      
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Seven years field experiments on application of corn stover and/or cattle manure combined with chemical fertilizers were carried out in Shouyang Dryland Farming Experimental Station. Results showed that the increased available N in tilth layer was mainly influenced by the application of cattle manure; available P content in tilth layer was mainly influenced by chemical fertilizer; available K in tilth layer was mainly influenced by the incorporation of corn stover. The organic matter content in the soils treated...

Seven years field experiments on application of corn stover and/or cattle manure combined with chemical fertilizers were carried out in Shouyang Dryland Farming Experimental Station. Results showed that the increased available N in tilth layer was mainly influenced by the application of cattle manure; available P content in tilth layer was mainly influenced by chemical fertilizer; available K in tilth layer was mainly influenced by the incorporation of corn stover. The organic matter content in the soils treated with corn stover or cattle manure were kept in balance under the experimental conditions. Corn yield and water use efficiency were influenced significantly not only by fertilizer N but also by incorporated corn stover. The results suggested that the highest N uptake, yield and water use efficiency could be obtained at rates of 105 kg fertilizer N, 6000 kg corn stover, and 1500 kg cattle manure per hectare. The experiments supply information on nutrient recycling and use of corn stover as sources of fodder and organic fertilizer. This information is also useful for balancing application of organic and inorganic fertilizer, improving soil fertility and increasing crop yield with application of corn stover.

研究探讨了玉米秸秆还田方式 (直接或过腹还田 )与化肥配施对土壤养分变化的影响。研究表明 ,秸秆过腹还田对提高耕层土壤速效 N贡献较大 ;耕层土壤速效 P含量主要与化肥施用量有关 ;耕层土壤速效 K含量与秸秆直接还田有关。该试验条件下 ,秸秆直接还田和秸秆过腹还田的土壤有机质含量基本保持平衡。产量统计分析表明 ,化肥对提高玉米产量及水分利用效率有明显影响 ,其次为秸秆直接翻压还田。适宜的秸秆直接还田量、秸秆过腹还田量与化肥 N配比 (试验中每公顷用量分别为 60 0 0、1 50 0和 1 0 5kg) ,其产量、水分利用效率和肥料 N的利用效率较高。研究为该区玉米秸秆作为饲源和有机肥源的合理再分配利用 ,秸秆、牛粪与化肥平衡配施 ,以及秸秆还田对土壤肥力的贡献和对作物产量的影响提供了依据。

The study presented the effects of two atmospheric CO 2 concentrations (350 and 700 μmol/mol), two levels of soil moisture (wet and drought) and five rates of nitrogen fertilizer ( N 0,50,100,150,200 mg·kg -1 ) on soil available nutriet content and nutrient uptake of spring wheat (Triticum aestivum L cv. Dingxi No. 8654). Results showed that high CO 2 concentration significantly reduced N uptake of wheat, especially in low N treatment, but had little effect on P and K uptake of wheat. N, P and K uptake...

The study presented the effects of two atmospheric CO 2 concentrations (350 and 700 μmol/mol), two levels of soil moisture (wet and drought) and five rates of nitrogen fertilizer ( N 0,50,100,150,200 mg·kg -1 ) on soil available nutriet content and nutrient uptake of spring wheat (Triticum aestivum L cv. Dingxi No. 8654). Results showed that high CO 2 concentration significantly reduced N uptake of wheat, especially in low N treatment, but had little effect on P and K uptake of wheat. N, P and K uptake by wheat were significantly lower in well\|watered treatments compared with in drought treatments. The effects of CO 2 increased on soil available N depended on soil water status. In well\|watered treatment, soil available N content was lower in the enriched CO 2 treatment compared with in the ambient CO 2 treatment, while in drought treatment, soil available N content was greater applied with N 50, 100, 150 mg·kg -1. High CO 2 concentration had little effect on soil available P and K content, but soil available P and K content were significantly greater at low N supply and insufficient water condition than at adequate N and water under adequate P and K supply.

研究了 2种CO2 浓度水平 ,2种土壤水分处理和 5种N肥施用水平对春小麦 (TriticumaestivumL cv DingxiNo 86 5 4)养分吸收和土壤速效养分的影响。结果表明 ,高CO2 浓度 (70 0 μmol·mol-1)明显降低春小麦对氮(N)的吸收 ,低N时降低更为明显 ,但对磷 (P)、钾 (K)吸收的影响不明显。小麦对N、P、K吸收 ,干旱处理明显比湿润处理低。CO2 浓度增高对土壤速效N的影响与土壤水分状况有关。湿润处理 ,CO2 浓度增加的处理速效N量比当前CO2 浓度的处理低 ;而干旱处理 ,施N 5 0、10 0、15 0mg·kg-1时 ,速效N则较高。高CO2 浓度对土壤速效P、K量的影响不明显 ,而低N和水分不足 ,土壤速效P、K量较高

Spring wheat (Triticum aestivum L.) was treated with two levels of temperature (22℃ and 28℃) and four fertilizer levels (N 1P 1K 1, N 1P 2K 2, N 2P 1K 1, N 2P 2K 2). The study showed with high N treatment, shoot, root and total dry mass weight and root/shoot ratio at 28℃ was lower than that at 22℃, with an average reduction of 27%, 42%, 30%, 20%,respectively; root N, P, K concentration and N, P, K uptake of spring wheat at 28℃ were lower than that at 22℃, too. Rhizosphere soil pH decreased 0.2 pH...

Spring wheat (Triticum aestivum L.) was treated with two levels of temperature (22℃ and 28℃) and four fertilizer levels (N 1P 1K 1, N 1P 2K 2, N 2P 1K 1, N 2P 2K 2). The study showed with high N treatment, shoot, root and total dry mass weight and root/shoot ratio at 28℃ was lower than that at 22℃, with an average reduction of 27%, 42%, 30%, 20%,respectively; root N, P, K concentration and N, P, K uptake of spring wheat at 28℃ were lower than that at 22℃, too. Rhizosphere soil pH decreased 0.2 pH compared with bulk soil pH. Temperature affected rhizosphere soil pH, but pH varied differently with different N treatments. With low N treatment, rhizosphere soil pH decreased 0.3 pH compared with soil pH at 22℃, no change at 28℃. With high N treatment, rhizosphere soil pH decreased at both 22℃ and 28℃, even more at 28℃. Rhizosphere soil nitrate (NO - 3-N) contents are much higher than bulk soil NO - 3-N under high N and temperature treatment. Rhizosphere soil NO - 3-Ν contents at 28℃ are higher than that at 22℃, even significant difference with high N treatment. Rhizosphere soil available P contents are lower than bulk soil P, but rhizosphere soil available P contents are higher with rising temperature,

试验设 2 2℃和 2 8℃两种温度水平 ,并设 N1 P1 K1 ,N1 P2 K2 ,N2 P1 K1 ,N2 P2 K2 4个肥料水平。结果表明 ,高氮时 ,2 8℃时春小麦地上部干物重 ,根干物重 ,干物质总量和根冠比率比 2 2℃时平均分别下降 2 7% ,4 2 % ,30 % ,2 0 % ,根系氮、磷、钾浓度和小麦对氮、磷、钾的吸收较 2 2℃时也低。根际土壤 p H约比土体 p H降低 0 .2 ,温度对根际土壤 p H值会产生影响 ,但不同氮肥用量处理表现不同 ,低氮时 ,2 2℃时根际土壤 p H值比原土降低 0 .3,而 2 8℃时根际土壤 p H值并不降低 ;高氮时 ,2 2℃和 2 8℃根际土壤 p H值均比原土降低 ,但 2 8℃时降低更多。高氮 2 8℃温度处理根际土壤 NO- 3 -N含量远比土体高 ,2 8℃时根际土壤 NO- 3 -N含量比 2 2℃时要高 ,氮肥用量高时更为明显。根际土壤速效 P含量比土体速效磷低 ,2 8℃温度时根际土壤速效磷量较高。

 
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