农学学报
農學學報
농학학보
Chinese Countryside Well-off Technology
2012年
12期
12-15,41
,共5页
周汉章%刘红霞%薄奎勇%宋银芳%贾海燕%吕芃%赵宇%王新玉%刘恩魁%侯升林
週漢章%劉紅霞%薄奎勇%宋銀芳%賈海燕%呂芃%趙宇%王新玉%劉恩魁%侯升林
주한장%류홍하%박규용%송은방%가해연%려봉%조우%왕신옥%류은괴%후승림
谷田%杂草%产量损失率%预测模型
穀田%雜草%產量損失率%預測模型
곡전%잡초%산량손실솔%예측모형
Millet Field%Weeds%Yield Loss%Prediction Model
为了综合治理谷田杂草,探索谷田杂草对谷子的危害及竞争规律。采用田间小区试验和非线性回归分析的方法,对主要的杂草竞争经验模型进行模拟和比较。结果表明,谷子产量损失率与杂草密度呈显著正相关,且随着杂草密度的增加呈减速增加的趋势。双曲线模型的决定系数R2为0.99712,最小残差平方和为16.174,是模拟谷田杂草与谷子竞争关系的优化模型。预测方程式为Y=d/（1.733＋0.018d）,杂草的种间竞争力为0.5770,种内竞争力为0.0103,谷子产量最大损失率为55.56%。本研究确定了谷田杂草对谷子为害的预测模型,将为谷田杂草综合治理提供有益帮助。
為瞭綜閤治理穀田雜草,探索穀田雜草對穀子的危害及競爭規律。採用田間小區試驗和非線性迴歸分析的方法,對主要的雜草競爭經驗模型進行模擬和比較。結果錶明,穀子產量損失率與雜草密度呈顯著正相關,且隨著雜草密度的增加呈減速增加的趨勢。雙麯線模型的決定繫數R2為0.99712,最小殘差平方和為16.174,是模擬穀田雜草與穀子競爭關繫的優化模型。預測方程式為Y=d/（1.733＋0.018d）,雜草的種間競爭力為0.5770,種內競爭力為0.0103,穀子產量最大損失率為55.56%。本研究確定瞭穀田雜草對穀子為害的預測模型,將為穀田雜草綜閤治理提供有益幫助。
위료종합치리곡전잡초,탐색곡전잡초대곡자적위해급경쟁규률。채용전간소구시험화비선성회귀분석적방법,대주요적잡초경쟁경험모형진행모의화비교。결과표명,곡자산량손실솔여잡초밀도정현저정상관,차수착잡초밀도적증가정감속증가적추세。쌍곡선모형적결정계수R2위0.99712,최소잔차평방화위16.174,시모의곡전잡초여곡자경쟁관계적우화모형。예측방정식위Y=d/（1.733＋0.018d）,잡초적충간경쟁력위0.5770,충내경쟁력위0.0103,곡자산량최대손실솔위55.56%。본연구학정료곡전잡초대곡자위해적예측모형,장위곡전잡초종합치리제공유익방조。
The study focused on weed management in summer season foxtail millet field by evaluating the weed damage and exploring competition between weeds and foxtail millet,a few fitting models were simulated and compared by employing field plot experiment and nonlinear regression analysis.The results showed that,the millet yield losses and weed density were highly significantly correlated.Among the tested models,the determination coefficient(R2) of hyperbolic model was 0.99712,and minimum sum of squared residuals was 16.174,which was considered the optimal model to simulate the competition relation between weeds and millet.The predicted equation was Y=d/(1.733 + 0.018d).The competitiveness between weed species was 0.5770,within the species was 0.0103.The maximum millet yield loss was 55.56%.This study had established a prediction model with high goodness-of-fit and practical prediction which could help weed management in summer season millet field.
