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黔川渝三地野生青蒿土壤养分状况调查分析 总被引：2，自引：0，他引：2
通过野外采样和室内分析,研究了采自贵州,四川、重庆三省(市)野生青蒿生长土壤的pH和养分含量.结果表明:三地总的说来pH适宜,速效钾、有效锌、有效铁含量充足,速效磷较充足,有机质、速效氮比较缺乏,有效铜严重缺乏.贵州速效钾、有效锌和有效铁充足,62.5%缺乏有机质、75%缺乏速效氮、有效铜和速效磷;四川速效钾、有效铁充足,速效磷基本不缺乏,且含量极高,54.54%缺乏有机质,45.45%缺乏速效氮,72.73%缺乏有效铜,54.55%缺乏有效锌;重庆速效钾、有效铁充足,速效磷含量较高,仅21.43%缺乏,711.42%缺乏有机质,57.14%缺乏速效氮,78.57%缺乏有效铜,21.43%缺乏有效锌.有机质含量对于土壤其它营养元素的含量和有效性均具有比较大的影响.而对于某些元素,其影响程度视不同土壤类型而变化.Abstract： Soil samples were collected from 33 areas in Guizhou, Sichuan and Chongqing where wild Arte-misia annua L.grows and 20 nutrient contents in them were assayed and analyzed.Generally speaking, in all the three provinces, pH value is appropriate, available potassium, available zinc and available iron are abundant, available phosphorus is relatively sufficient, organic matter and available nitrogen is relatively insufficient and available copper is seriously lacking.Soil samples from Guizhou contain sufficient available potassium, available zinc and available iron.62.5% of the samples lack organic matter and 75% lack avail-able nitrogen, available copper and available phosphorus.Soil samples from Sichuan contain sufficient a-vailable potassium and available iron.Available phosphorus is sufficient and its content is high.54.54% of the samples lack organic matter, 45.45% lack available nitrogen, 72.73% lack available copper and 54.55% lack available zinc.Soil samples from Chongqing contain sufficient available potassium and availa-ble iron.Available phosphorus is relatively sufficient, and only 21.43% of the soil samples lack available phosphorus.71.42% of the samples lack organic matter, 57.14% lack available nitrogen, 78.57% lack a-vailable copper and 21.43% lack available zinc.The content of organic matter has great effect on the con-tents and availability of other nutrients.The degree the effect of some nutrients varies with soil type. 相似文献
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为了探究川白芷[Angelica dahurica (Fisch. ex Hoffm.) Benth. et Hook.f.]的开花物候特征和繁育系统类型,本试验以川白芷为材料,测定不同时期花粉活力、花粉胚珠比和杂交指数,结合人工授粉试验,对其开花生物学特征进行综合研究。结果表明,川白芷群体开花物候期约30 d,复伞形花序花期14～16 d,单花花期6～9 d。花粉-胚珠比(P/O)为1 440.5,杂交指数OCI=4,结合人工授粉试验,表明川白芷自交、异交亲和,交配系统类型为兼性异交型,意大利蜜蜂(Apis mellifera ligustica)为主要传粉昆虫。本研究可为川白芷的杂交育种和产品开发提供理论依据。 相似文献
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