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   土壤速效p 在 植物保护 分类中 的翻译结果: 查询用时:0.068秒
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土壤速效p
相关语句
  soil available p
    PCA analysis indicated that soil available P was the most important factor affecting composition of weed communities, and followed by soil available N.
    主成分分析表明:土壤速效 P 是影响田间杂草种群组成最为重要的因子,而速效 N 则为第二重要因子。
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    Phosphorus content of the poplar bark was correlated positively with both the disease index and the available P in the soil layer.
    树皮中全P含量与该层土壤速效P含量及感病指数均具有显著的正相关性。
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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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Soil condition affects the epidemic of Dothiorella gregaria Sacc. severely in that a positive correlation was found between the available phosphorus in 41~60cm depth of soil and disease index of the canker , while a negative correlation was found between pH of the soil layer and the disease index. Phosphorus content of the poplar bark was correlated positively with both the disease index and the available P in the soil layer. The available P and pH of the soil layer showed positive effect on the canker whereas...

Soil condition affects the epidemic of Dothiorella gregaria Sacc. severely in that a positive correlation was found between the available phosphorus in 41~60cm depth of soil and disease index of the canker , while a negative correlation was found between pH of the soil layer and the disease index. Phosphorus content of the poplar bark was correlated positively with both the disease index and the available P in the soil layer. The available P and pH of the soil layer showed positive effect on the canker whereas the total nitrogen and the available potassium of the soil layer showed negative effect as revealed by path analysis. The order of effect is: P>K>N>pH .

土壤条件对箭杆杨溃疡病的流行与抗病性及发病程度具有明显影响。40~60cm深层土壤中的速效P与病情指数是显著正相关,pH与病情指数呈负相关。树皮中全P含量与该层土壤速效P含量及感病指数均具有显著的正相关性。通径分析指出,该层土壤的速效P及其pH对病情指数产生正效应;而全N、速效K对病情指数产生负效应。它们的效应大小依次为:P>K>N>pH。

Plot trials were carried out to study effects of different patterns of long-term fertilization on composition of weed communities in maize field. The results show that no significant difference was observed in composition of weed communities between plots receiving balanced NPK fertilization of organic manure or chemical fertilizer. In plots without P application changes in composition of weed communities were obvious and so was the case in plots without N application, though not so obvious as it was with...

Plot trials were carried out to study effects of different patterns of long-term fertilization on composition of weed communities in maize field. The results show that no significant difference was observed in composition of weed communities between plots receiving balanced NPK fertilization of organic manure or chemical fertilizer. In plots without P application changes in composition of weed communities were obvious and so was the case in plots without N application, though not so obvious as it was with the former. In plots without K application, however, composition of the weed communities remained almost unchanged. PCA analysis indicated that soil available P was the most important factor affecting composition of weed communities, and followed by soil available N.

通过田间小区试验,研究了长期不同施肥对玉米田间杂草种群组成的影响。结果表明:N、P、K平衡施用时,无论是施用有机肥,或是施用无机化肥,田间杂草的种群组成相似;不施用 P 肥能显著引起杂草种群组成的改变;不施用 N 肥也有一定的影响,但不施用 K 肥却无显著影响。主成分分析表明:土壤速效 P 是影响田间杂草种群组成最为重要的因子,而速效 N 则为第二重要因子。

 
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