Results 111 to 120 of about 286,119 (148)

施肥对金沙江干热河谷退化草地土壤微生物的影响

open access: yesShuitu Baochi Xuebao, 2005
在金沙江干热河谷区的退化草地上进行了2年的氮磷施肥试验,试验结束后分析了土壤特性及土壤微生物数量和生物量的变化。结果表明,在施氮量为5 ,15g/ (m2 ·a)时,土壤微生物的数量和生物量均没有明显变化,而当施氮量增加到2 5g/ (m2 ·a)时,土壤微生物的数量和生物量比对照明显增加。施磷没有引起土壤微生物数量和生物量的明显增加。施氮和施磷均没有引起土壤细菌、真菌和放线菌组成的变化。这表明氮虽然影响土壤微生物的数量,但对土壤微生物的组成没有影响。施氮导致土壤硝态氮增加,但对氨态氮影响不大 ...
doaj  

[Analysis of the misdiagnosis causes and treatment strategies for burns combined with alcohol withdrawal syndrome]. [PDF]

open access: yesZhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Shang XZ   +8 more
europepmc   +1 more source

[Research advances in non-pharmacological interventions in pediatric asthma]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Wang WR, Peng W, Zheng XR.
europepmc   +1 more source

Home - About - Disclaimer - Privacy