Results 21 to 30 of about 2,613 (119)
Ultrasound in Obstetrics &Gynecology, Volume 64, Issue 3, Page 294-307, September 2024.ABSTRACT Objective To assess the association between increased maternal prepregnancy body mass index (BMI) and the risk of congenital heart defect (CHD) in offspring. Methods This systematic review and meta‐analysis searched PubMed/MEDLINE, Web of Science and Scopus from inception to 20 April 2023.
N. Salmeri +5 more
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World Water Policy, Volume 10, Issue 3, Page 649-697, August 2024.Abstract This article presents an in‐depth overview of recent developments and prospects in utilizing green microbiology for sustainable water management. It highlights its vital role across various aspects of water management while underscoring its significance for global development. This article delves deep into microbial processes integral to water
Adenike A. Akinsemolu +2 more
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Lianas shift towards larger sizes and more acquisitive trait values in an Asian tropical rainforest
Biotropica, Volume 56, Issue 2, March 2024.Liana communities showed a shift in trait values indicating that they changed towards more large, acquisitive lianas with rapid water use. There are more larger stems through time due to the relatively low mortality of the larger individuals, which is associated with relatively low levels of disturbance.
Qi Liu +3 more
wiley +1 more source
GCB Bioenergy, Volume 16, Issue 1, January 2024.The use of biochar increased greenhouse gas (GHG) emissions but countered the harm caused by GHG emissions by considerable soil carbon sequestration resulting in a negative carbon footprint. Furthermore, the use of biochar lowered the proportion of CH4 and N2O, demonstrating that biochar usage has a considerable positive effect on GHG emissions ...
Zhuoxi Chen +4 more
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Shuitu Baochi Xuebao, 2017 为了探明施有机肥对耕地棕壤团聚体及钙素分布的影响，以长期定位施肥近30年的耕地棕壤为研究对象，采用干筛法进行土壤团聚体分级，系统研究了单施有机肥及有机肥配施氮磷肥对耕地棕壤团聚体及不同形态钙素分布的影响。结果表明：与不施肥对照相比，施有机肥可增加＞1 mm粒级团聚体含量，且随有机肥施入量的增加而增加，最高增加了66.68%；与单施有机肥相比，配施氮磷肥则降低了＞1 mm粒级团聚体含量；与对照相比，单施及配施有机肥均降低了0.25～1 mm粒级团聚体含量，降幅最高达15.20 ...
张大庚 +5 more
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Shuitu Baochi Xuebao, 2006 采用草莓盆栽试验研究了3种肥料类型（普通肥料、控释氮肥、控释复合肥）及其不同施肥方式对氮磷钾利用率、氮素在土壤一作物体系中的平衡及草莓生长的影响。结果表明，相对于普通肥料、控释氮肥和控释复合肥提高了土壤中有效养分的含量，促进了草莓生长，提高了草莓糖酸比和维生紊C含量。不同肥料类型间，植株干重、草莓产量和氮磷钾利用率大小顺序为：控释复合肥〉控释氮肥〉普通肥料。控释氮肥处理土壤中氮的残留率最高，其次为控释复合肥。氮的损失率大小顺序为：普通肥料〉控释氮肥〉控释复合肥。不同施肥方式间草莓糖酸比和维生素C含量 ...
邵蕾, 张民, 王丽霞
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Shuitu Baochi Xuebao, 2011 为了减少巢湖流域的农业非点源污染,保护农业生态环境,寻求高产稳产和环境友好的最佳结合点,研究了巢湖流域3种施肥措施大田示范条件下水稻田地表径流氮磷流失和排水沟渠水质特征及水稻产量情况。结果表明:减量化施肥的地表径流总氮(TN)浓度比常规施肥的低23%,总磷(TP)浓度低16%;减量化施肥沟渠的TN浓度比常规施肥的低38%,总P低49%。优化施肥的地表径流TN浓度比常规施肥的低13%,TP浓度低约3%;优化施肥的沟渠TN浓度比常规施肥的低26%,TP浓度低7%。优化施肥的产量最高 ...
汪丽婷 +6 more
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Shuitu Baochi Xuebao, 2008 采用培养试验研究了长期施肥对黑土矿化与硝化作用特征的影响。结果表明,黑土的矿化作用和硝化作用都较强,长期施肥对黑土矿质态氮量有显著影响,施用化肥能够增加矿质态氮量,在施用NPK肥基础上增施有机肥,矿质态氮量进一步增加,表明在土壤管理上如果增加有机肥的施用,可以提高土壤的供氮能力。长期施肥黑土的硝化率与施N肥相关性较好,其次是施用PK肥。有机肥与无机肥配施可使土壤硝化率显著提高;硝化率高低取决于黑土可矿化态氮素含量和土壤pH。
王斯佳, 韩晓增, 侯雪莹
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Shuitu Baochi Xuebao, 2018 探讨不同有机物施用对土壤肥力与作物养分吸收利用的影响，以达到农田培肥和提升作物养分利用效率的目的。2015年在江西省红壤研究所布置田间施肥试验，设置不施肥（CK）、常量化肥(CF)、减量化肥（RF）、全量化肥配施秸秆（CFR）、减量化肥配施秸秆（RFR）、全量化肥配施生物黑炭（CFB）、减量化肥配施生物黑炭（RFB）、减量化肥配施猪粪（RFP）、减量化肥配施蚓粪（RFV）9种不同施肥处理，研究全量化肥和减施40%化肥条件下配施不同有机物对土壤肥力及作物养分利用效率的影响。结果表明 ...
邬梦成 +8 more
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Shuitu Baochi Xuebao, 2019 为了提高设施蔬菜滴灌水肥利用效率，在日光温室内开展了为期15个月不同滴灌施肥时机对设施蔬菜产量品质、土壤-蔬菜系统中氮素分布、氮素平衡和氮素利用效率的研究。结果表明：滴灌施肥时机对果实产量、全氮和硝酸盐含量有显著影响，灌水中前期施肥处理产量、全氮和硝酸盐含量均较高，随着施肥时段向后推移，蔬菜吸收氮素先增大后减小）灌水后期施肥处理在收获后各层土壤硝态氮含量最低且消耗量最高，灌水中期施肥处理土壤-蔬菜系统表观损失和氮盈余小，较其他处理低15.35%~59.13 ...
黄倩楠 +4 more
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