盐碱地冬枣园土壤管理的新模式研究OA

To address the technical problems of severe soil salinization,active water-salt movement,and unstable improvement effects in winter jujube orchards on northern coastal saline-alkali land,a field experiment was conducted in a moderate saline-alkali winter jujube orchard at the National Agricultural Science and Technology Park of Binzhou,Shandong Province from 2021 to 2024.Two treatments were set up:a comprehensive regulation model(experimental group)consisting of precision drip irrigation,winter deep ploughing with large soil clods,and inter-row grassing,and a traditional model(control group)with flood irrigation and clean tillage.The effects of different soil management models on soil physical and chemical properties,growth,fruiting and economic benefits of winter jujube were systematically studied.The results showed that compared with the control,the soil pH,total water-soluble salt content and soil bulk density in the experimental group were decreased by 7.8%,45.9%and 10.8%,respectively;the soil organic matter content was increased by 136.2%;the contents of total nitrogen,total phosphorus and total potassium were increased by 54.2%,32.8%and 12.4%,respectively.The average single fruit weight,first-class fruit rate and soluble solid content of winter jujube were increased by 5.4 g,8 percentage points and 6.1 percentage points,respectively,and the economic benefit per 666.7 m2 was increased by 3 299.5 yuan.The comprehensive improvement model,which precisely inhibits soil capillary action and blocks the upward channel of water-salt movement in the whole growth cycle,can stably and durably reduce root-zone salt content,improve soil structure,and significantly enhance the yield,quality and planting benefit of winter jujube.It is suitable for popularization and application in the northern Shandong and similar coastal saline-alkali areas.