In order to evaluate the productivity of reclamation lands in mining districts, field investigation and spatial information technique were adopted to investigate influence factors of land. Based on the collected data ...In order to evaluate the productivity of reclamation lands in mining districts, field investigation and spatial information technique were adopted to investigate influence factors of land. Based on the collected data of each land, membership grade of each factor was obtained based on Fuzzy logic, and combined weight of each factor was got by analytica1 hierarch process and Delphi method. According to membership grades and combined weights of all factors, integrated fertility index (IFI) of every land was calculated to reflect levels of the productivity of reclamation lands in mining districts. Experimental results show that spatial information technique is an efficient method in field data collection, while lack of evaluation data. By means of quantificational analysis of this method, IFI is appropriate to describe the productive capacity level of reclamation lands.展开更多
Yinzhou District of Ningbo City is the home and main production area of Fritillaria thunbergii Miq. Based on the analysis of Fritillaria thunbergii Miq. production in Yinzhou District in 2015,this paper firstly introd...Yinzhou District of Ningbo City is the home and main production area of Fritillaria thunbergii Miq. Based on the analysis of Fritillaria thunbergii Miq. production in Yinzhou District in 2015,this paper firstly introduced current situation of Fritillaria thunbergii Miq. planting. The competition of Fritillaria thunbergii Miq. products was in disorder,the market price in 2015 dropped to half in 2014,and many Fritillaria thunbergii Miq. growers suffered losses. To keep sustainable development of traditional Fritillaria thunbergii Miq. industry in old production areas and maintain brand and name of genuine materials of " Zhejiang 8 Famous Kinds Herbal Medicines",it is required to actively reduce the inventory,make up short board,strengthen advantages,implement the reform of supply font,keep up with the times and market,and succeed through improving the quality.展开更多
Net Primary Productivity (NPP) is the basis of the material and energy transport calculation in ecosystem studies. NPP directly reflects the production capacity of plant communities under natural conditions. Ecosystem...Net Primary Productivity (NPP) is the basis of the material and energy transport calculation in ecosystem studies. NPP directly reflects the production capacity of plant communities under natural conditions. Ecosystem services are hot topics in the field of ecology. Many studies calculate ecosystem service value based on NPP. Taking Guanshanhu District of Guiyang City, Guizhou Province as the research object, using TM, ETM<sup>+</sup>, Gaofen2 and MOD17A3HGF.006 as data sources, this paper analyzed the change of ecosystem service value based on NPP in 2000, 2010 and 2020. The results showed that the area of forest ecosystem increased during 2000-2010 and decreased during 2010-2020. The artificial surface grew rapidly from 1146.82 hm<sup>2</sup> to 7544.29 hm<sup>2</sup> during 2000-2020. The farmland ecosystem decreased from 13308.29 hm<sup>2</sup> to 6342.33 hm<sup>2</sup> during 2000-2020. With the dynamic changes in ecosystem spatial distribution and component structure, the total NPP in 2000, 2010 and 2020 was 12.58 × 10<sup>4</sup> t, 11.90 × 10<sup>4</sup> t and 11.78 × 10<sup>4</sup> t, respectively, showing a decreasing trend. The total value of natural and semi-natural ecosystems services based on NPP showed an increasing trend, which was ￥ 6.938 × 10<sup>8</sup> in 2000, ￥ 8.052 × 10<sup>8</sup> in 2010 and ￥ 10.306 × 10<sup>8</sup> in 2020 respectively. The ecosystem contributed the most to the ecological service value in 2000 was farmland, but in 2010 and 2020, it was the forest ecosystem. The ecological service value of grassland and wetland was relatively small, while the ratio of the wetland ecological service value displayed a decreasing trend. In the future, it is necessary to establish a strict pretrial system for land use, so as to effectively protect the natural and semi-natural ecosystems and fulfill the growing ecological demands of residents.展开更多
为进一步提高黄河南岸灌区水氮利用效率,实现农田水肥深度节约的目标,于2023年在鄂尔多斯市杭锦旗吉日嘎朗图镇开展了滴灌条件水氮调控试验,研究了滴灌条件下不同水氮处理对玉米产量及水氮利用效率的影响并进行了水氮用量优化。结果表明...为进一步提高黄河南岸灌区水氮利用效率,实现农田水肥深度节约的目标,于2023年在鄂尔多斯市杭锦旗吉日嘎朗图镇开展了滴灌条件水氮调控试验,研究了滴灌条件下不同水氮处理对玉米产量及水氮利用效率的影响并进行了水氮用量优化。结果表明:同一灌水条件下,中氮处理玉米产量较低氮处理增加23.3%、水分利用效率增加7.14%、氮肥偏生产力降低18.3%,较高氮处理玉米产量增加2.8%、水分利用效率增加7.7%、氮肥偏生产力增加38.1%。同一施肥条件下,中水处理玉米产量较低水处理增加37.1%、水分利用效率增加26.1%、氮肥偏生产力增加16.6%,较高水处理玉米产量增加12.8%、水分利用效率增加38.3%、氮肥偏生产力增加12.9%。建立灌水量、施氮量与玉米产量、水分利用效率、氮肥偏生产力之间的三组回归模型,通过寻优得到三组水氮区间并取交集,获得同时满足高产、高水氮利用效率的全生育期水氮总用量优化区间为1800~2046 m ^(3)·hm^(-2)与210~249.2 kg·hm^(-2)。引用以Jensen模型为基础的水氮生产函数对生育期水氮总用量优化区间进行了各生育期分配,合理分配了滴灌条件下各生育期水氮制度。研究成果可为沿黄南岸灌区玉米种植水肥管理模式和方案提供参考。展开更多
基金Project(41061043)supported by the National Natural Science Foundation of ChinaProject(2010CD032)supported by the Natural Science Foundation of Yunnan Province,China
文摘In order to evaluate the productivity of reclamation lands in mining districts, field investigation and spatial information technique were adopted to investigate influence factors of land. Based on the collected data of each land, membership grade of each factor was obtained based on Fuzzy logic, and combined weight of each factor was got by analytica1 hierarch process and Delphi method. According to membership grades and combined weights of all factors, integrated fertility index (IFI) of every land was calculated to reflect levels of the productivity of reclamation lands in mining districts. Experimental results show that spatial information technique is an efficient method in field data collection, while lack of evaluation data. By means of quantificational analysis of this method, IFI is appropriate to describe the productive capacity level of reclamation lands.
文摘Yinzhou District of Ningbo City is the home and main production area of Fritillaria thunbergii Miq. Based on the analysis of Fritillaria thunbergii Miq. production in Yinzhou District in 2015,this paper firstly introduced current situation of Fritillaria thunbergii Miq. planting. The competition of Fritillaria thunbergii Miq. products was in disorder,the market price in 2015 dropped to half in 2014,and many Fritillaria thunbergii Miq. growers suffered losses. To keep sustainable development of traditional Fritillaria thunbergii Miq. industry in old production areas and maintain brand and name of genuine materials of " Zhejiang 8 Famous Kinds Herbal Medicines",it is required to actively reduce the inventory,make up short board,strengthen advantages,implement the reform of supply font,keep up with the times and market,and succeed through improving the quality.
文摘Net Primary Productivity (NPP) is the basis of the material and energy transport calculation in ecosystem studies. NPP directly reflects the production capacity of plant communities under natural conditions. Ecosystem services are hot topics in the field of ecology. Many studies calculate ecosystem service value based on NPP. Taking Guanshanhu District of Guiyang City, Guizhou Province as the research object, using TM, ETM<sup>+</sup>, Gaofen2 and MOD17A3HGF.006 as data sources, this paper analyzed the change of ecosystem service value based on NPP in 2000, 2010 and 2020. The results showed that the area of forest ecosystem increased during 2000-2010 and decreased during 2010-2020. The artificial surface grew rapidly from 1146.82 hm<sup>2</sup> to 7544.29 hm<sup>2</sup> during 2000-2020. The farmland ecosystem decreased from 13308.29 hm<sup>2</sup> to 6342.33 hm<sup>2</sup> during 2000-2020. With the dynamic changes in ecosystem spatial distribution and component structure, the total NPP in 2000, 2010 and 2020 was 12.58 × 10<sup>4</sup> t, 11.90 × 10<sup>4</sup> t and 11.78 × 10<sup>4</sup> t, respectively, showing a decreasing trend. The total value of natural and semi-natural ecosystems services based on NPP showed an increasing trend, which was ￥ 6.938 × 10<sup>8</sup> in 2000, ￥ 8.052 × 10<sup>8</sup> in 2010 and ￥ 10.306 × 10<sup>8</sup> in 2020 respectively. The ecosystem contributed the most to the ecological service value in 2000 was farmland, but in 2010 and 2020, it was the forest ecosystem. The ecological service value of grassland and wetland was relatively small, while the ratio of the wetland ecological service value displayed a decreasing trend. In the future, it is necessary to establish a strict pretrial system for land use, so as to effectively protect the natural and semi-natural ecosystems and fulfill the growing ecological demands of residents.
文摘为进一步提高黄河南岸灌区水氮利用效率,实现农田水肥深度节约的目标,于2023年在鄂尔多斯市杭锦旗吉日嘎朗图镇开展了滴灌条件水氮调控试验,研究了滴灌条件下不同水氮处理对玉米产量及水氮利用效率的影响并进行了水氮用量优化。结果表明:同一灌水条件下,中氮处理玉米产量较低氮处理增加23.3%、水分利用效率增加7.14%、氮肥偏生产力降低18.3%,较高氮处理玉米产量增加2.8%、水分利用效率增加7.7%、氮肥偏生产力增加38.1%。同一施肥条件下,中水处理玉米产量较低水处理增加37.1%、水分利用效率增加26.1%、氮肥偏生产力增加16.6%,较高水处理玉米产量增加12.8%、水分利用效率增加38.3%、氮肥偏生产力增加12.9%。建立灌水量、施氮量与玉米产量、水分利用效率、氮肥偏生产力之间的三组回归模型,通过寻优得到三组水氮区间并取交集,获得同时满足高产、高水氮利用效率的全生育期水氮总用量优化区间为1800~2046 m ^(3)·hm^(-2)与210~249.2 kg·hm^(-2)。引用以Jensen模型为基础的水氮生产函数对生育期水氮总用量优化区间进行了各生育期分配,合理分配了滴灌条件下各生育期水氮制度。研究成果可为沿黄南岸灌区玉米种植水肥管理模式和方案提供参考。
