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水稻、小麦的籽粒数与饱满程度对于产量影响很大。特别在我国北方,六月上旬的干热风,九月下旬的低温,很不利于小麦和水稻灌浆,而常使粒重下降。在种植过晚生育期延迟,或者贪青晚熟时,这种现象尤为严重。近几年来我们在北京郊区几个公社的试验证明,在水稻、小麦开花末期、灌浆初期,以适宜的浓度叶面喷洒萘乙酸,可以增加穗粒数,促进灌浆,增加千粒重,提高产量。对小麦的增产效果试验品种为农大139,有稻茬小麦和旱作小麦。药剂浓度为20ppm,每亩喷药液量为50—100斤。处理时间为开花末期、灌浆初期。试验结果如表1。
Rice, wheat, grain number and full extent of a great impact on the yield. Especially in the northern part of our country, the hot and dry wind in early June and the low temperature in late September are unfavorable to the wheat and rice grouting, and often cause the grain weight to drop. This phenomenon is particularly severe when the late growth period of planting is late, or when it is greedy and late-maturing. In recent years, our experiments in several communes in the suburbs of Beijing have proved that sprinkling naphthaleneacetic acid at the appropriate foliar concentrations at the late flowering and early filling stages of paddy and wheat can increase grains per spike, promote grain filling, increase 1000-grain weight and increase yield. Yield-increasing effect on wheat The experimental varieties are Nongda 139, with rice stubble and dry wheat. Pharmacy concentration of 20ppm, spraying liquid per acre 50-100 pounds. Processing time for flowering, early filling. The test results are shown in Table 1.