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基于不同熟性棉花品种的异地分期播种试验,综合量化品种特性、主要气象条件(温度、太阳辐射)和栽培措施(施氮量)对棉花铃期与棉籽干物质积累的影响,基于生理发育时间,建立棉花铃期模拟模型,并基于棉籽生长的“库限制”假设,建立棉籽干物质积累模拟模型.通过量化棉铃对位叶氮浓度的变化,为模型构建氮素效应函数.利用不同生态点的品种、播期和施氮量田间试验资料对模型进行检验,结果表明:德夏棉1号、科棉1号和美棉33B的铃期预测值与实测值的根均方差(RMSE)分别为2.25d、2.61d和2.75d,科棉1号和美棉33B的棉籽干物质模拟值与实测值的RMSE分别为9.5mg·seed-1和8.2mg·seed-1.表明该模型预测精度较高.
Based on the different seeding date of cotton cultivars with different maturity, the effects of main quantitative parameters, main meteorological conditions (temperature, solar radiation) and cultivation measures (nitrogen application) on cotton bolls and dry matter accumulation of cottonseed, , A cotton boll age simulation model was established and a simulation model of dry matter accumulation in cottonseed was established based on the “bank restriction ” hypothesis of cottonseed growth.The nitrogen effect function was constructed for the model by quantifying the change of nitrogen concentration in boll leaves, The results showed that root mean square error (RMSE) of the predicted value and the measured value of the boll date of Dexia cotton 1, Kemian 1 and Mianmian 33B were all tested in the field experiment. Respectively, and the RMSE of simulated and measured cottonseed dry matter yield of Kemian 1 and Mianbian 33B were 9.5 mg · seed-1 and 8.2 mg · seed-1, respectively, which showed that the prediction precision of the model was 2.25d, 2.61d and 2.75d, Higher.