现代农业科技
現代農業科技
현대농업과기
XIANDAIHUA NONGYE
2012年
18期
112-113
,共2页
麦田%蜡烛草%经济阈值%防除指标
麥田%蠟燭草%經濟閾值%防除指標
맥전%사충초%경제역치%방제지표
wheat field%Phlenmpaniculatum Huds.%economic threshold%control in index
进行不同密度的蜡烛草对小麦产量影响的田间试验,结果表明:小麦产量损失率与蜡烛草密度的最佳回归模型为韦布尔函数Y=a×{1-(1/(exp[(x-b)d/c])}。其中,a=73.212 1,b=9.623 8,c=503.850 1,d=1.018 3。蜡烛草的经济危害允许水平为3.98%,防除阈值为39.3株/m2。
進行不同密度的蠟燭草對小麥產量影響的田間試驗,結果錶明:小麥產量損失率與蠟燭草密度的最佳迴歸模型為韋佈爾函數Y=a×{1-(1/(exp[(x-b)d/c])}。其中,a=73.212 1,b=9.623 8,c=503.850 1,d=1.018 3。蠟燭草的經濟危害允許水平為3.98%,防除閾值為39.3株/m2。
진행불동밀도적사충초대소맥산량영향적전간시험,결과표명:소맥산량손실솔여사충초밀도적최가회귀모형위위포이함수Y=a×{1-(1/(exp[(x-b)d/c])}。기중,a=73.212 1,b=9.623 8,c=503.850 1,d=1.018 3。사충초적경제위해윤허수평위3.98%,방제역치위39.3주/m2。
Different densities of Phlenm paniculatum Huds.for wheat yield were studied, the results showed that the best regression model of wheat yield loss and Phlenmpaniculatum Huds. density for the Weibull Function was Y=a×{1-(1/(exp[(x-b)d/c])}.其中,a=73.212 1,b=9.623 8,c=503.850 1,d=1.018 3. The economic harm permissible level of Phlenm paniculatum Huds. was 3.98% ,control in the threshold value was 39.3 plant per square meters.