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p supply ability
相关语句
  供磷能力
     Effect of P contents in soil on crop yield and P supply ability
     土壤磷素对作物产量及供磷能力的影响
短句来源
  相似匹配句对
     On Effective Supply
     论有效供给
短句来源
     demand and supply;
     既有需求的原因 ,也有供给的原因 ;
短句来源
     demand and supply;
     既有需求的原因 ,也有供给的原因 ;
短句来源
     ability of study;
     学习能力;
短句来源
     On Supply Innovation
     论供给创新
短句来源
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In this paper soils under Chinese fir plantation in the southern Anhui province were studied, bv means of fractionation of organic and inorganic phosphorus compounds in soils, selection of analytical technique for determining soil available phosphorus, and correlation of the above-mentioned items to site index or phosphorus content in current needle of Chinese fir. It turned out that the quantities of Al-P correlated significantly with both site index and P o in the current needle of Chinese fir...

In this paper soils under Chinese fir plantation in the southern Anhui province were studied, bv means of fractionation of organic and inorganic phosphorus compounds in soils, selection of analytical technique for determining soil available phosphorus, and correlation of the above-mentioned items to site index or phosphorus content in current needle of Chinese fir. It turned out that the quantities of Al-P correlated significantly with both site index and P o in the current needle of Chinese fir as the limiting factors among various soil nutrients. The storage of organic-P in soil also correlated significantly with site index, of which the storage of active organic-P was the most important one. Bray il method Was - fied from 4 techniques for determining available-P as the better one for soil under Chinese fir pic ruction. Quantity of active organic-P could also be used as an index to assess soil nutritive conditions. The soil criteria of P supplying ability worked out here were much lower than that commonly used for farmland.

以皖南杉林土壤为研究材料,做了无机磷和有机磷的分级测定以及速效磷分析方法的筛选,并把所得数据与立地指数及叶磷浓度联系起来。结果表明,土壤中的磷酸铝盐量(表层含量及全土贮量)与立地指数或叶磷农度都显著相关,是土壤养分中的限制因子;土壤的有机磷贮量与立地指数的相关性也明显,在这方面尤其是活性有机磷贮量的作用最重要。从4种速效磷测定方法中筛选出的BrayⅡ法,其全群数据的极差最大,并能反映Al-P与杉木生长量的关系,是适用于杉林土壤的较好方法。活性有机磷量也可作为衡量杉林土壤营养状况的一个指标,但回归分析表明其重要性亚于BrayⅡ法测定的速效磷。本文拟订的供磷能力分等标准比农田习用的要低得多。

red soils differing in fertility levels were tested to study the relationships between soil microbial biomass P and soil P or P plant-availability. The results showed that red soil microbial biomass P was closely related with soil total P, soil organic P and soil rapidly available P. Relative coefficients were 0.840, 0.897 and 0.944, respectively. Especially, the significant relation of red soil microbial biomass P to soil rapidly available P suggested that...

red soils differing in fertility levels were tested to study the relationships between soil microbial biomass P and soil P or P plant-availability. The results showed that red soil microbial biomass P was closely related with soil total P, soil organic P and soil rapidly available P. Relative coefficients were 0.840, 0.897 and 0.944, respectively. Especially, the significant relation of red soil microbial biomass P to soil rapidly available P suggested that red soil microbial biomass P may act as an indicator of P-supply ability. Greenhouse incubation expriments showed that red soil microbial biomass P was also closely related with ryegrass dry matter yield, ryegrass P uptake and P uptake per unit weight of ryegrass. Relative coefficients were 0.789, 0.895 and 0.910, respectively, which indicated that P plant-availability of red soil microbial biomass P was not only reflected on ryegrass dry matter and plant P uptake,but also more obviously reflected on P uptake per unit weight of plant.

对有机质水平差异较大的7种菜茶果园红壤和1种红壤性水稻土进行了微生物量P与土壤P以及P植物有效性之间的相关性研究。结果表明,红壤微生物量P与土壤全P、土壤有机P以及土壤速效P之间存在明显正相关,相关系数分别为0.840, 0.897和0.944。红壤微生物量P尤以与土壤速效P关系最为密切,红壤微生物量P有可能作为红壤供P能力的一个活指标;盆栽试验表明,微生物量C与黑麦草产量呈显著正相关,与黑麦草吸P量以及单位黑麦草吸P量相关性不明显;而微生物量P与黑麦草产量、黑麦草吸P量以及单位黑麦草吸P量之间均呈显著正相关,相关性依次增强;红壤微生物量P在指示土壤植物有效P上的作用不仅体现在植物的产量和植物吸P量上, 更体现在植物的品质~单位重量植物的吸P量上。

 
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