冷型小麦灌浆期农田热量分配状况初探

A study on the farmland heat distribution conditions of cold type wheat during milk-filling.

根据农田小气候观测资料分析冷型小麦“陕229”和暖型小麦“9430”农田热量分配差异及成因结果表明,灌浆期冷型小麦“陕229”比“9430”品种株间0.2m～2/3株高和2/3株高～冠顶的潜热通量分别偏高17.35～67.40W/m^2和45.39～153.38W/m^2,湍流热通量分别偏低33.67～84.25W/m^2和21.24～142.99W/m^2,通过地面的土壤热通量偏低10.80～13.24W/m^2。不同温度型小麦农田热量分配的差异是由其生物学特性的差异所致,且是导致冷型小麦农田生态环境较冷湿的主要原因。

Based on the observed data from farmland microclimate, the farmland heat distribution conditions and the causes are analysed. The results show that the latent heat fluxes of 'Shaan229' are 17. 35 - 67.40W/m2 and 45.39- 153. 38W/m2 higher than those of '9430' and the turbulent heat fluxes of 'Shaan 229' are 33. 67 - 84. 25W/m2 and 21. 24 -142.99W/m lower than those of '9430' respectively at 0.2m to 2/3 plant height and at 2/3 plant height to plant top in row. The heat flux at soil surface in 'Shaan229' is 10. 80 -13. 24W/m2 lower than that in '9430'. The difference of the farmland heat distribution conditions between two temperature type wheats is caused by the difference of the biological characteristics. This difference is the main cause bringing about cooler and wetter farmland ecological environmental of the cold type wheat.