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上海郊区三熟制粮食将逐步为二熟制所替代、但随着经济作物面积的扩大,估计仍有较大面积的晚稻在七月底完成移栽。对这部分晚稻(本文仍称后季稻)大田生长初期如何充分利用光温资源,作如下探讨。 (一)不同时期的光温资源对产量的影响我县十一年的气象资料表明,后季稻产量与大田生育期的总积温呈显著正相关,r=0.6182。8、9、10三个月总积温超过2100℃的高温年有四年(75、77、78、83),平均产量为664斤;不足2050℃的两年,产量分别为414、478斤(表1)。
Three crops in Shanghai suburbs will be gradually replaced by two crops, but with the expansion of cash crops, it is estimated that a large area of late rice will be transplanted by the end of July. This part of late rice (this article is still called after the quarter of rice) How to make full use of light and temperature in the early growth of field resources for the following discussion. (A) of different periods of light and temperature resources on the yield Eleven years of meteorological data show that the yield of late rice and field growth during the total accumulated temperature was significantly positive (r = 0.6182.8,9,10 three The monthly total accumulated temperature exceeds 2100 ℃ in high temperature for four years (75,77,78,83), the average yield of 664 kg; less than 2050 ℃ in two years, the output was 414,478 kg (Table 1).