Results 11 to 20 of about 1,278 (109)
Shuitu Baochi Xuebao, 2004 通过田间氮磷肥配施试验研究了氮磷配施对黑土玉米农田生态系统玉米不同生育时期微生物量碳、氮的影响。微生物量随玉米不同生育期的动态变化表明,氮磷肥对微生物量碳和微生物量氮的动态影响并不同步,微生物量碳和微生物量氮变化最显著的时期均是授粉期,但此时微生物量碳是最低的谷值,而微生物量氮是最高的峰值。不同氮磷配比对微生物量碳影响的回归分析表明,氮肥是影响微生物量碳的主导因素,无论是适量施用还是过量施用都是氮肥对微生物量碳的影响较大。不同氮磷配比对微生物量氮影响的回归分析表明 ...
王继红 刘景双 于君宝 王金达
doaj +2 more sources
Shuitu Baochi Xuebao, 2020 选择黄土高原森林带自东向西8个地区优势植物的土壤作为研究对象，探究不同经度下土壤养分和土壤微生物生物量生态化学计量特征。结果表明：土壤碳、氮和微生物生物量碳、氮、磷含量随经度整体呈现出先减少后增加的变化趋势，土壤微生物生物量碳氮磷与土壤碳氮之间存在耦合关系，对环境因子的响应具有-致性。土壤磷含量空间分布比较稳定。土壤碳氮比为8左右，土壤有机碳与全氮的空间分布具有-致性。土壤微生物生物量碳氮比为9左右，微生物生物量氮磷比为5左右，反映了土壤微生物生物量碳氮、氮磷的比值较稳定 ...
贾培龙 +5 more
doaj
Integrative Conservation, EarlyView.The Asian Songbird Crises negatively affects so‐called master birds, species that are used to increase the song complexity of competitive songbirds. We assessed the trade in a master bird, the crested jayshrike, in Indonesia before and after its legal protection.
Vincent Nijman +11 more
wiley +1 more source
Shuitu Baochi Xuebao, 2006 在亚热带丘陵区红壤幼龄茶园经过4年稻草覆盖及间作三叶草田间小区试验，对土壤剖面分析结果表明．稻草覆盖及间作三叶草均能明显增加土壤表层有机C、碱解N、有效P．增加土壤微生物量C、N、P。剖面中土壤有机C、微生物量C、全N、碱解N、土壤微生物量N、全P、有效P、微生物量P随深度的增加而递减。稻草覆盖影响到40cm土层左右，阃作白三叶草影响到20cm左右。0～20cm土层微生物量C／有机CT2〉T3〉T1，3个处理微生物量N／全N在1．02～2．74之间，微生物量P和全P比值在2．27～13．1之间 ...
沈程文 +5 more
doaj +2 more sources
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Decomposition is the transformation of dead organic matter into its inorganic constituents. In most biomes, decomposition rates can be accurately predicted with simple mathematical models, but these models have long under‐predicted decomposition in globally extensive ...
Heather L. Throop +8 more
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra +3 more
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract The stoichiometric imbalance caused by nitrogen (N) deposition typically exacerbates phosphorus (P) limitation in plants. However, it remains unclear whether this effect extends to soil microbes, particularly those in the rhizosphere.
Jipeng Wang +5 more
wiley +1 more source
保水剂和微生物菌肥配施对旱作燕麦土壤微生物生物量碳、氮含量及酶活性的影响
Shuitu Baochi Xuebao, 2020 为探讨保水剂和微生物菌肥配施后旱作燕麦土壤微生物生物量碳、氮含量及酶活性的影响，在内蒙古黄土高原旱作农田设置不施用保水剂和微生物菌肥（CK）、保水剂和微生物菌肥配施（A）、单施微生物菌肥（B）和单施保水剂（C）4个处理，分析燕麦全生育期内0—10，10—20，20—40 cm土壤微生物生物量碳、氮含量及酶活性时空动态变化和产量变化。结果表明：（1）全生育期，土壤微生物量碳含量呈"双峰"曲线变化，峰值均出现在孕穗期和灌浆期；氮含量呈先降低后升高再降低趋势，苗期含量最高；过氧化氢酶、蔗糖酶、脲酶活性均呈 ...
田露 +6 more
doaj
Conservation Biology, EarlyView.Abstract Illegal wildlife trade (IWT) is one of the largest global illegal activities, and it negatively affects biodiversity and sustainable development worldwide. DNA barcoding coupled with high‐throughput sequencing (i.e., metabarcoding) is useful in identifying taxa affected by IWT and has been used routinely for decades.
Maria Joana Ferreira da Silva +9 more
wiley +1 more source
Comprehensive framework for assessing and optimizing existing research networks
Conservation Biology, EarlyView.Abstract Conservation, monitoring, and research networks, or collections of ecological research sites unified under a common mission of data collection or a research mission, are essential infrastructure for understanding large landscapes. However, most networks developed opportunistically over decades rather than through systematic design, creating ...
Alyson East +2 more
wiley +1 more source