Resources Science ›› 2017, Vol. 39 ›› Issue (3): 501-512.

• Orginal Article •

### Cultivation patterns of main grain crops and evaluation of water and heat resource utilization efficiency in Jilin Province from 1993 to 2013

Mengmei SONG1(), Pingli AN1(), Li JIANG1, Lujia CAI2, Zhe ZHANG1, Can HUANG1

1. 1. College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,China
2. Beijing Municipal Commission of Urban Planning,Huairou Branch,Beijing 101400,China
• Received:2016-10-24 Revised:2017-01-12 Online:2017-03-20 Published:2017-03-20

Abstract:

Crop water and heat resource utilization efficiency changes are the foundations for increasing grain yield potential,realizing sustainable development of agriculture,and optimizing crop distribution and responses to climate change. Based on meteorological and statistical data in Jilin,China from 1993 to 2013,according to three crop accumulated temperature requirements,we divided climate planting boundaries and estimated water and heat resource utilization efficiency in an area expanded by climate warming. From 1993 to 2013,the accumulated temperature zone had an obvious eastward enlargement,climatic planting limits of rice and maize expanded eastward to the Dunhua-Jingyu-Linjiang line,and climatic planting limits of soybean expanded eastward to Changbai. The heat resource utilization efficiency of three crops in the sensitive area was lower than in the non-sensitive area,but the water resource utilization efficiency was higher than that in the non-sensitive area. Meanwhile,crop water and heat resource utilization efficiency in sensitive areas had a significant increasing trend and the average annual growth rate was higher than in the non-sensitive area. The water and heat resources yield efficiency of rice and maize in the sensitive area was higher than in the non-sensitive area,but the yield efficiency of soybean in the sensitive area was lower than that in the non-sensitive area. The conclusions were that climate warming had a positive effect on water and heat resource efficiency in the study area. The study area could appropriately expand the planting area of maize and rice to the east,and the irrigation system and technology should be strengthened to reduce water resource constraints on rice. Local residents should avoid blindly planting grain and soybean in the most eastern region in order to reduce the risk of heat resource constraints.