您要查找的是不是：
- grain yield fluctuation 粮食产量波动
- Since founding of the nation, the grain yield of Jinan enhances rapidly, but food production's growth is not a stable change process, but increases in the fluctuation. 济南市的粮食生产波动直接关系到济南市的粮食生产持续稳定增长,影响其稳定的粮食供给能力和农业可持续发展道路的顺利进行。
- The conclusions are as following: The fluctuation of purveyance production is related with grain yield, especially the production of maize is the dominant factor. 研究发现：这种波动与主要粮食作物的产量密切相关，其中玉米产量的影响最大；
- Grain yield is heavily influenced by the architecture of the inflorescence. 花序的构型严重影响谷粒生产量。
- However, the output of japonica in northeast is unstable, and the way to weaken the fluctuation is to change the growth mode, reduce the range of yield fluctuation. 但东北地区粳稻生产波动幅度较大，波动频率较高，易出现大起大落的状况，在实际生产中必须转变产量增长方式，降低单产的波动幅度，促进东北粳稻生产平稳发展。
- Raised bed planting (RBP) can get higher grain yield and water use efficiency than flat planting (FP). 垄作小麦冠层为波浪状，有利于提高小麦的籽粒产量和水分利用效率。
- Temperature within extremely low and high levels, affected spikelet formation, ripening, and final grain yield. 极低、极高范围内的温度影响小穗生成、成熟和最终籽粒产量。
- In 1952 the average grain yield per mu (one ha equals 15 mu) was 80 kg and there were only 125 kg of grain per person. 1952年，西藏每亩(15亩合1公顷)粮食产量平均只有80公斤，人均占有粮食仅125公斤。
- Under high phosphorus conditions, however, the grain yield of the Andean genotypes was lower than that of the Mesoamerican genotypes. 然而,在高磷条件下,安第斯基因型的种子产量显著低于中美基因型。
- The increasing in grain yield was about 10.3%, 8.9%, 23.2%respectively as compared with the plastic film mulch, the straw mulch and the unmulched cultivatiom. 稻谷产量较地膜覆盖、秸秆覆盖、露地旱作栽培分别增产10.;3%25;8
- They have gathered high grain yields for five years in a row. 他们连续5年获得粮食高产。
- Correlation of maize root number,LAI and grain yield at anthesis stage is significant. 开花期玉米根系数量和最大叶面积指数(LAI)与产量都达极显著正相关；
- MNPK and NPK promoted wheat growth and development and head length formation, then raised wheat grain yield. 有机肥配施化学肥料(MNPK)或NPK配施，有利于小麦获得较高产量。
- Cantrell R G,Geadelmann J L.Contribution of husk leaves to maize grain yield[J].Crop Sei. 霍仕平;许明陆;晏庆九等.;玉米果穗苞叶性状的遗传分析
- In the absence of irrigated, electricity andji geng conditions, grain yield in 1952 from 237 kg to 774 kg in 1962. 在没有水浇、电力和机耕的条件下，粮食亩产量从1952年的237斤增加到1962年的774斤。
- Results showed that using nitrogen increased nitrogen cumulate, grain yield, protein content, and grain protein yield. 结果表明，施用氮肥提高了小麦植株的氮素积累量、子粒产量、蛋白质含量和蛋白质产量。
- Correlation analysis revealed that flag leave angle increased grain yield by increasing spikelet fertility. 相关性分析表明，较小的剑叶角度可通过提高结实率进而显著增加产量。
- Reasons for the differences in the formation of grain yield and quality among DCMS, DCMF and MC were also discussed. 文章最后对水稻不同种植方式间在产量和品质形成上的差异进行了讨论。
- The fresh weight and vigor of root system and the content of chlorophyll were positively correlated with the biomass and grain yield. 根鲜重、活力和叶绿素含量与生物产量和籽粒产量呈显著或极显著正相关。
- Recent reports estimate a decline in available agricultural land of the order of 13-15 per cent and a drop of grain yield of as much as 30 per cent. 最近有报告估计,如果现有农田减少大约13-15%25,粮食产量将会降低30%25。
