2023年9月30日 星期六
农桐间作的生态特点与行距优化
The ecological characteristics of interplanting system of Paulownia elongata S. Y. Hu with crops and row distance optimizing
1992年 第1卷 第2期 页码[31-36]    下载全文[0.7MB]  
摘要

本文以河南省封丘县鲁冈乡境内的泡桐-小麦-玉米(paulownia-wheat-maize)间作为研究对象,对农桐间作系统的土壤养分与小气候,林木与农作物的生物生产力等进行了系统测定;分析了林带间环境因子与农作物产量之间的相互关系;运用Logistic曲线拟合林带内农作物产量,设计了农桐间作的最优行距,为探讨农林复合系统的结构优化提出了新方法。

Abstract

The interplanting system of paulownia with crops is a main model of agroforestry managementin Huanghuaihai plain of China. A seven- year- old complex system of paulownia (Paulownia elungata S. Y. Hu) interplanted with wheat and maize in Fengchiu Testing Area was comprehensively researched. Compared with the monocropping system, the complex system had higher productivity, more stable microclimate condition, and higher level of nutrient content of soil. It was found that solar radiation was the dominant factor influencing the crop yield in the complex system. Logistic equation was used to estimate the crop yield in the complex system as follows: F =K/ (1 +AE-BX)for wheat and F =K/ (1+EAX2+ BX+C) for maize, X (m ) , distance from shelterbelt; Y (kg/m2 ) , crop yield. By integrating the imitated logistic equation, we could estimate the total crop yield in various structures of complex systems. Moreover, by establishing a equation group, we could calculate the optimized row distance, it was 55 meters at which the interplanting system would acquire highest economic, ecological and social benefits.

关键词农桐间作; 逻辑斯蒂方程; 行距优化; 农林复合系统
Key wordsinterplanting system of paulownia with crops; logistic equation; optimizing row distance; agroforestry
作者殷云龙 蔡天麒 姜志林
所在单位江苏省植物研究所 , 南京 210014
南京林业大学林学系 , 南京 210037
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下载次数669
基金项目中国科学院封丘农业生态站资助