摘要
在栽培条件相同的情况下,影响上海郊区小麦产量的主要因子是看麦娘、牛繁缕的数量及雨日。小麦产量损失率与看麦娘、牛繁缕的数量及雨日的相关式为:Y=0.014 6X_1+0.345 1X_2+0.267 4X_3+1.468 7,F=112.469 1。用试验资料检验预测模型,并进行大田预测预报,预测模式的准确率达87.2％～92.3％。
The main factors affecting the wheat output in Shanghai area are the quantity of Alopecurus aequalis, the quantity of Malachium aquaticum and rain days when soil and fertilizer conditions are controlled. The correlation exbression between the loss rate of wheat output and the quantity of Alopecurus aequalis, the quantity of Malachimn aquaticum and rain days is : Y= 0. 014 6X_1 + 0. 345 1 X_2+0. 267 4X_3 + 1. 468 7. Testing the predicting model expression with the experimental data, we tested and verified it in fields in 1988, the accuracy of the predicting model expression was 87. 2％～92.3％.
出处
《上海农业学报》
CSCD
1992年第4期73-76,共4页
Acta Agriculturae Shanghai
关键词
看麦娘
牛繁缕
小麦
产量
杂草
Alopecurus aequalis, Malachium aquaticum, Wheat output, Weeds, Correlation coefficient
