安徽农业科学
安徽農業科學
안휘농업과학
JOURNAL OF ANHUI AGRICULTURAL SCIENCES
2009年
31期
15502-15503,15505
,共3页
降水资源特征%西北半干旱区%种植业结构调整
降水資源特徵%西北半榦旱區%種植業結構調整
강수자원특정%서북반간한구%충식업결구조정
Precipitation resource characteristics%Northwest semiarid regions%Adjustment of planting structure
根据研究区降水少、变率大、旱灾频繁的基本规律,特别是降水季节分配不均、有效性差的降水资源特征,得出西北半干旱地区降雨对作物产量的影响不仅与年降雨量的多寡相关,而且与降雨的时空分布有极大关系.分别就夏粮作物、秋粮作物单产量与年降雨量和作物生长期降雨量的相关程度,讨论了九华沟流域种植业结构的调整.
根據研究區降水少、變率大、旱災頻繁的基本規律,特彆是降水季節分配不均、有效性差的降水資源特徵,得齣西北半榦旱地區降雨對作物產量的影響不僅與年降雨量的多寡相關,而且與降雨的時空分佈有極大關繫.分彆就夏糧作物、鞦糧作物單產量與年降雨量和作物生長期降雨量的相關程度,討論瞭九華溝流域種植業結構的調整.
근거연구구강수소、변솔대、한재빈번적기본규률,특별시강수계절분배불균、유효성차적강수자원특정,득출서북반간한지구강우대작물산량적영향불부여년강우량적다과상관,이차여강우적시공분포유겁대관계.분별취하량작물、추량작물단산량여년강우량화작물생장기강우량적상관정도,토론료구화구류역충식업결구적조정.
According to the basic laws of less precipitation, high variable rate, frequent droughts in the study area, especially, the characteristics of precipitation resources (the uneven seasonal distribution of the precipitation and poor effectiveness) , a conclusion was drawn that the effects of precipitation in northwest semiarid areas on the crop yield was not only related to the amount of annual rainfall, but it was also related to the space and time distribution of precipitation. The adjustment of planting structure in Jiuhuagou Watershed was discussed according to the size of the correlation coefficient between the single yield oi summer crops and autumn crops and annual precipitation and the rainfall precipitation in the growth period of crops.
