Results 71 to 80 of about 3,188 (126)
Shuitu Baochi Xuebao, 2008 采用室内模拟土柱淋洗方法研究了无机复合肥、有机复合肥、猪粪堆肥和花生麸4种肥料单施和两两混施条件下氮磷在赤红壤中的淋失特征。结果表明,各处理总氮淋失率在43.2%～74.8%之间,总磷淋失率在0.01%～0.08%之间,赤红壤中肥料氮淋失严重,肥料磷淋失有限。肥料单施处理的无机氮淋失量和有机氮基本相近,肥料混施处理的无机氮淋失量远高于有机氮;各施肥处理磷的淋失均以颗粒磷为主。肥料混施显著增加铵态氮和无机氮淋失,减少有机氮和总氮淋失。猪粪与复合肥混施减少颗粒磷和总磷淋失 ...
曾曙才 +3 more
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Shuitu Baochi Xuebao, 2020 研究黄土高原侵蚀环境下林地开垦后坡面土壤养分空间分布状况，确立林地开垦后侵蚀驱动的坡地土壤养分空间变异特征。以黄土高原丘陵区子午岭林地和开垦28年的侵蚀坡面为研究对象，分析土壤主要性质和养分含量的变化情况，运用经典统计学和地统计法分析坡面土壤基本性质和养分空间分布规律。林地开垦后坡面土壤pH增加了0.24个单位，有机质、全氮、全磷和铵态氮、硝态氮、速效磷和速效钾分别降低了13.77，1.14，0.10 g/kg和6.05，1.63，4.99，58.44 mg/kg。林地的土壤有机质 ...
王昭 +6 more
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Shuitu Baochi Xuebao, 2020 为明确增密减氮对烤烟产质量及肥料利用率的调控效应。以烤烟品种"云烟105"为材料，研究种植密度（13 890，15 150，16 665株/hm2）和施氮水平（0，84，94.5，105 kg/hm2）及其互作对烤烟产质量及养分利用效率的影响。结果表明：适度增密减氮能显著提高烤烟肥料利用率、产量和产值，使烟叶总糖、还原糖、钾含量显著升高，总氮、烟碱含量降低，对水溶性氯无显著影响，烟叶化学品质更加协调。烟叶化学成分协调性及烤烟氮磷钾利用率显著受年份、密度、施氮及年份×施氮、密度×施氮、年份×密度 ...
余小芬 +10 more
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Shuitu Baochi Xuebao, 2011 针对长期不合理高化肥投入量导致城郊区菜地土壤环境恶化的现状,为探讨氮肥减施对城郊区菜地土壤氮磷累积及蔬菜产量品质的影响,应用田间小区试验,研究了长沙市郊2种不同菜地土壤中,氮肥减施20%与缓释尿素,脲酶抑制剂/硝化抑制剂,土壤调理剂配合施用的环境和农学效应。结果表明:与常规施肥处理相比,采用缓释尿素减施20%化学氮肥(80%N(CRU))有效降低了菜地土壤Olsen-P和NO3--N的含量,减少了其面源污染风险,但该处理蔬菜可食部分容易累积硝酸盐,也增加了食用风险;通过添加脲酶抑制剂/硝化抑制剂减施20%
全智 +6 more
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[Dietary secoisolariciresinol diglucoside alleviates chronic kidney disease in offspring rats caused by maternal trans-fatty acid exposure by regulating the Bcl-2/Bax/caspase-3 signaling axis]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoMa S, Chen M, Wu T, Zhao W.
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[Hereditary erythrocytosis caused by a novel EGLN1 gene mutation: a case report]. [PDF]
Zhonghua Xue Ye Xue Za ZhiZhang QG +5 more
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[Medical treatment standards for emergency burn wounded (2025 edition)]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiNational Health Commission Of The People's Republic Of China.
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[Preparation of a novel polyhydroxy silica stationary phase and application in the separation of alginate oligosaccharides]. [PDF]
Se PuJiao RW +9 more
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[Gut-vascular axis in Kawasaki disease: short-chain fatty acid-mediated immune regulation and therapeutic targets]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiWang SD, Liu F.
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[Exercise-induced hyperinsulinism: genetic basis and clinical management]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiZhang QT, Hou L.
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