China News Service, Yiyang, August 29
Author Fu Jingyi
In August, the blue waves of Datong Lake in Hunan Province were rippling, and various water birds swept across the lake, and the grasses under the lake swayed gently.
In the thousands of mu of intensive fish ponds separated by a bank, villager Zhang Jianqing and a dozen workers are harvesting the third batch of water plants such as Myriophyllum spicatum and Hydrilla verticillata this year.
"Now the fish ponds along the Datong Lake do not raise fish anymore. They are all planted with'golden grass'." Zhang Jianqing, 57, has been engaged in fish farming after graduating from high school. In the past, the average benefit per acre was less than 2,000 yuan (RMB, below). same).
Unexpectedly, in order to control the water quality of the Great Lakes, the replanted aquatic plants were “forced” to retreat and replant, but the income per mu reached 10,000 yuan.
Datong Lake is one of the four larger lakes that make up Dongting Lake, and it is also an important water body and natural barrier that maintains the ecological safety of South Dongting Lake.
However, due to predatory farming by contracted enterprises, the total phosphorus and total nitrogen of the lake exceeded the standard, and the water quality was once inferior to Category V.
In 2017, China initiated the comprehensive improvement of Dongting Lake's water environment, and Datong Lake began a several-year "ecological water conservation" project.
Datong Lake is located at the bottom of the Dongting Lake area, and the aquaculture wastewater produced by the surrounding fertilizer and bait will flow into the big lake.
In 2019, in accordance with the plan of “retirement, pollution interception, dredging, greening, and living water”, the Datong Lake District of Yiyang had to require all 6000 acres of intensive fish ponds along the route to be retired.
At first, most of the farmers were unwilling, for fear that decades of rice bowls would be destroyed like this.
"Aquatic plants can not only accumulate nitrogen and phosphorus, continuously improve water quality, but can also be sold for the treatment, regulation and suppression of lake eutrophication. Datong Lake has been significantly improved by planting grass." Xia Zhongming, deputy general manager of Datong Lake Investment Development Co., Ltd. Said that the technical team delivered grass seeds to the door, provided free technical training, and signed underwriting orders for aquatic plants, which eliminated the resistance of the villagers.
The water quality of Datong Lake continued to improve, and gradually bid farewell to lake areas inferior to Grade V water quality, and was selected as the "Excellent Case of Beautiful Rivers and Lakes", and the water plants were also sold all over China.
Xia Zhongming introduced that there are hundreds of aquatic plants in the company's 3000 acres of aquatic plants. The sales profit in 2020 will reach 3 million yuan, and it is expected to exceed 10 million yuan this year.
Not only that, under the guidance of the government, local villagers tried new ecological breeding models such as "aquatic plants + hairy crabs" and "aquatic plants + green shrimps".
Villager Zhang Jianqing earned 70,000 yuan from the farming of prawns in the first half of this year.
"The hairy crabs are growing well. There is no problem in increasing income by more than 100,000 yuan after the National Day." He said.
In Yuanjiang City, in the hinterland of Dongting Lake, 450,000 mu of reeds grow on the Huzhou wetland. The newly developed green food "Dongting Cordyceps" asparagus and "Dongting Lake Fresh" mushrooms are sold at home and abroad, with an annual industrial output value of 3.6 billion yuan. .
As a raw material for papermaking, reeds once brought a large number of papermaking companies and considerable financial revenues to Yuanjiang. However, as the ecological environment protection continued to increase, it was nowhere to be sold and became a "burden".
How to use reed resources with unbalanced supply and demand to reduce production capacity and destocking, and the tradition of people in the lake district of self-gathering and eating reed sprouts has allowed the locals to find inspiration for transformation and development.
The sprouts of reeds are commonly known as "asparagus". After tasting them, Ouyang Xiu, a writer in the Northern Song Dynasty, wrote that "The scallion and anchovy have a taste, and I hate to share a cup and plate". It is a rare delicacy; using idle reeds as a substrate to cultivate edible fungi explored The reed mushrooms are not only high in yield, good taste, but also rich in nutrients.
In this "beep" supply-side reform, Lianglu's goal is directed at tens of billions of industries.
The "land of fish and rice" Dongting Lake once again unearthed the "gold mine" of agriculture in the green ecology.
In Yiyang alone, seven advantageous characteristic industries have been formed in the past few years, including rice shrimp in Nanxian County, Lanxi rice, and Datong Lake hairy crabs. The combined output value of the five major industries, including rice shrimp, aquatic products, and vegetables, will reach 104.1 billion yuan in 2020.
A new era of agricultural reforms is being "tested" on the land of Dongting Lake.
In August 2021, Hunan Province issued the "Yiyang City Modern Agriculture Comprehensive Reform Pilot Program" notice. From 2021 to 2025, Yiyang will continue to carry out the modern agricultural comprehensive reform pilot program, breaking new ground for Dongting Lake and Hunan modern agriculture.