Abstract
摘要： 试验于2004年在河南安阳(黄河流域黄淮棉区)和江苏南京(长江流域下游棉区)大田进行。氮素设0、120、240、360和480 kg hm-2(分别用N0、N1、N2、N3、N4表示) 5个水平, 磷、钾施用量分别为185 kg hm-2和118 kg hm-2, 研究花铃期棉田土壤速效养分时间、空间变异特征及对棉花产量品质的影响。结果表明, 随着生育进程, 两试点N0处理0~60 cm土壤各层碱解氮呈先降低后升高的趋势, 其他4个处理先呈现下降趋势, 棉田追肥后, 含量明显增加, 之后明显降低, 吐絮后又开始回升; 两试点速效磷、速效钾含量均表现为先降低后升高的趋势。0~60 cm土壤各层速效养分含量随深度的增加呈下降的趋势。相同土层碱解氮、速效磷含量随距棉株水平距离的增加, 南京N1、N2、N3、N4处理呈下降趋势, N0处理水平变异特征不明显; 南京碱解氮含量时空变异较安阳显著, 安阳速效磷含量时空变异较南京显著。南京0~60 cm、安阳20~60 cm土层速效钾含量表现为随距棉株水平距离的增加均呈下降趋势, 而安阳0~20 cm呈现相反趋势。安阳、南京分别以360 kg hm-2和240 kg hm-2施氮水平棉花产量构成相对合理、皮棉产量最高、纤维长度和比强度较优。因此, 不同生态区应根据花铃期棉田速效养分时空变异特征, 确定适宜施肥量, 提高棉花产量品质。
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 15
Claim · model-written summary
At both sites under N0, soil alkali hydrolyzable nitrogen first declined then rose with development.
- Taxon
- Cotton
Gossypium hirsutumt0 - Outcome
- 碱解氮e0
- Direction
- 先降低后升高e0
- Setting
- 两试点e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“两试点N0处理0~60 cm土壤各层碱解氮呈先降低后升高的趋势”
t0“Cotton”
Claim · model-written summary
Under the other four treatments, soil alkali hydrolyzable nitrogen fell, rose after topdressing, fell again, then recovered after boll opening.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- 含量e0
- Qualifier
- 其他4个处理e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“其他4个处理先呈现下降趋势, 棉田追肥后, 含量明显增加, 之后明显降低, 吐絮后又开始回升”
t0“Cotton”
Claim · model-written summary
Available phosphorus at both sites initially declined and later increased.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- 速效磷e0
- Direction
- 先降低后升高e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“两试点速效磷、速效钾含量均表现为先降低后升高的趋势”
t0“Cotton”
Claim · model-written summary
Available potassium at both sites initially declined and later increased.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- 速效钾e0
- Direction
- 先降低后升高e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“两试点速效磷、速效钾含量均表现为先降低后升高的趋势”
t0“Cotton”
Claim · model-written summary
Available nutrients declined with soil depth to 60 cm.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- 速效养分含量e0
- Direction
- 下降e0
- Setting
- 0~60 cm土壤各层e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0~60 cm土壤各层速效养分含量随深度的增加呈下降的趋势”
t0“Cotton”
Claim · model-written summary
At Nanjing under N1 to N4, alkali hydrolyzable nitrogen declined with horizontal distance from cotton.
Verbatim
e0“相同土层碱解氮、速效磷含量随距棉株水平距离的增加, 南京N1、N2、N3、N4处理呈下降趋势”
Claim · model-written summary
At Nanjing under N1 to N4, available phosphorus declined with horizontal distance from cotton.
Verbatim
e0“相同土层碱解氮、速效磷含量随距棉株水平距离的增加, 南京N1、N2、N3、N4处理呈下降趋势”
Claim · model-written summary
N0 showed no clear horizontal variation.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- 水平变异特征e0
- Direction
- 不明显e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N0处理水平变异特征不明显”
t0“Cotton”
Claim · model-written summary
Nanjing showed greater spatiotemporal variation in alkali hydrolyzable nitrogen than Anyang.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“南京碱解氮含量时空变异较安阳显著”
t0“Cotton”
Claim · model-written summary
Anyang showed greater spatiotemporal variation in available phosphorus than Nanjing.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“安阳速效磷含量时空变异较南京显著”
t0“Cotton”
Claim · model-written summary
Available potassium declined with distance at 0 to 60 cm in Nanjing and 20 to 60 cm in Anyang.
Verbatim
e0“南京0~60 cm、安阳20~60 cm土层速效钾含量表现为随距棉株水平距离的增加均呈下降趋势”
Claim · model-written summary
At 0 to 20 cm in Anyang, available potassium showed the opposite distance trend.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- 相反趋势e0
- Setting
- 安阳0~20 cme0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“而安阳0~20 cm呈现相反趋势”
t0“Cotton”
Claim · model-written summary
At Anyang, 360 kg hm-2 N gave the highest lint yield and favorable yield components and fiber traits.
Not reportedComparator
Verbatim
e0“安阳、南京分别以360 kg hm-2和240 kg hm-2施氮水平棉花产量构成相对合理、皮棉产量最高、纤维长度和比强度较优”
Claim · model-written summary
At Nanjing, 240 kg hm-2 N gave the highest lint yield and favorable yield components and fiber traits.
Not reportedComparator
Verbatim
e0“安阳、南京分别以360 kg hm-2和240 kg hm-2施氮水平棉花产量构成相对合理、皮棉产量最高、纤维长度和比强度较优”
Claim · model-written summary
Fertilizer rates should be set by nutrient variation during flowering and boll stage in each ecological region.
Verbatim
e0“不同生态区应根据花铃期棉田速效养分时空变异特征, 确定适宜施肥量, 提高棉花产量品质”