桑基鱼塘




桑基鱼塘（mulberry fish pond），是池中养鱼、池埂种桑的一种综合养鱼方式。是为充分利用土地而创造的一种挖深鱼塘，垫高基田，塘基植桑，塘内养鱼的高效人工生态系统。珠江三角洲地区的桑基魚塘是世界著名的生態農業模式，還有蔗基魚塘。


將養蠶產生的廢物作為魚糧，魚排泄物沈於塘底成為營養豐富的腐植質塘泥，可以為桑樹及其他經濟樹的肥料。在浙江湖州桑基魚塘還成為全球重要農業文化遺產。[1]


桑基鱼塘的发展，既促进了种桑、蚕業及养鱼事业的发展，又带动了缫丝等加工工业的前进，逐渐发展成一种完整的、科学化的人工生态系统。


然而近年高經濟價值魚類的市場需求增加，農民紛紛捨基就塘，使得蠶絲產量下降。


珠三角地區絕大部分桑基魚塘在幾十年的工業化和城鎮化大潮中消逝，而西樵七星村在1972年被聯合國教科文組織評為“桑基魚塘農田示範區”，村內絕大部分土地被劃定為農田保護區，保存著珠三角最好的近10萬畝桑基魚塘區[2]。



注釋





  1. ^ http://finance.ifeng.com/a/20171124/15817649_0.shtml


  2. ^ 珠三角桑基鱼塘“沧海遗珠”引入生态开发 广东新闻网 2015-03-22









-

Popular posts from this blog

Guess what letter conforming each word

Image
6 $begingroup$ This is an entry in the Fortnightly Topic Challenge #41: Short and Sweet. 1 letter only could be mean anything . With an additional letter in front , could be used as medicine component and something you definitely learn or at least heard once. Add another letter in front , you would possibly hear that many times . Add an additional letter in front , you would found an independent country . With an additional letter, in the end , you would found something related to apple . Add another letter in the end , you would found something bad . Hint: Each letter is unique . word knowledge letters chemistry share | improve this question ...
Read more

Port of Spain

Image
For ports in the country of Spain, see List of ports in Spain. City in City of Port of Spain, Trinidad and Tobago Port of Spain City City of Port of Spain Top to bottom (left to right): Skyline of Port of Spain from Gulf of Paria; National Academy for the Performing Arts, Independence Square, Eric Williams Plaza; MovieTowne, Port of Port of Spain Motto(s):  "We Gather Strength As We Go Along" Port of Spain Coordinates: 10°40′N 61°31′W  /  10.667°N 61.517°W  / 10.667; -61.517 Coordinates: 10°40′N 61°31′W  /  10.667°N 61.517°W  / 10.667; -61.517 Country   Trinidad and Tobago Jurisdiction City of Port of Spain Settled 1560 Incorporated (town) 1853 Incorporated (city) 1914 Government  • Mayor Joel Martinez  • Governing body City Corporation Area [1]  • City 12 km 2 (5 sq mi) Elevation [2] 66 m (217 ft) Population (2011) [1]  • City 37,074  • Rank 3rd  • Density 3,090/km 2 (8,000/sq mi)...
Read more

Run scheduled task as local user group (not BUILTIN)

Image
0 I am trying to run a scheduled task with User Group (not a single user). This is working fine when I in the field "when running a task, use the following user account:" insert BUILTIN User Group (for example: Administrators or Users). But when I try it with the created Local User Group (example: TestGroup) it is not working. The Users in the TestGroup are the same as in the Administrators group. What could be the problem? Are there some restrictions to the Created User Group compared to BUILTINUsers? scheduled-tasks taskscheduler windowstaskschedule share | improve this question asked Nov 15 '18 at 15:36 Far...
Read more