Tritiated water was used as tracer to measure tree transpiration in a 28-year old Chinese pine plantation of north China during the growing season of 1984.
于1984年生长季,利用氚水作为示踪剂对河北隆化碱房乡大水泉村西山28年生油松人工林树木蒸腾进行了测定。
Accurate forecast of wheat harvest period is the premise to obtain uttermost crop yields. The phonological sequentiality and synchronization could be applied to forecast the growing season of crops.
可靠准确的小麦收获期预报是适时收获、最大限度获取产量的前提,物候现象出现的顺序性和同步性,可用来预测作物生长期。
Growing food at these elevations is always difficult because of the short growing season.
在这种海拔地区种植粮食总是很困难,因为生长季节短。
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