单 位：
西北农林科技大学农学院;中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱作农业国家重点实验室
关键词：
宁南半干旱偏旱区;糜子;春小麦;降水生产潜力;适度开发
摘 要：
1997～ 1999年在宁南半干旱偏旱区国家宁南 (海原 )旱农试区设置了旱地糜子与春小麦降水生产潜力及其适度开发试验 ,采用肥力梯度法研究有限降水条件下旱地糜子与春小麦的最大产量与适宜开发度。研究结果表明 ,宁南半干旱偏旱区旱地糜子 3年 (3种降水年型 )平均降水生产潜力为 176 0 .5 kg/ hm2 ,水分利用效率 WU E为0 .6 47kg/ m3 ,潜力适宜开发度为 90 % ,适宜施肥量为氮 90 kg/ hm2、磷 45 kg/ hm2 ;宁南旱地春小麦 3年 (1998～1999年 ,有冬灌 )平均水分生产潜力和 WU E分别为 2 5 5 4.0 kg/ hm2 和 0 .90 3kg/ m3 ,1997年纯旱地降水生产潜力和 WUE分别为 115 8.0 kg/ hm2 和 0 .6 90 kg/ m3 ,潜力适宜开发度为 85 % ,适宜施肥量为氮 6 0 kg/ hm2 、磷 30 kg/hm2 。
译 名：
Climate Productive Potential and Its Exploitation of Dryland Crop in South Ningxia
作 者：
LI Jun 1,2 , WANG Li xiang 2, SHAO ming an 1, TAO Shi heng 2 (1.State Key Lab of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources,
关键词：
semiarid prone to draught area in south Ningxia; broomcorn millet; spring wheat; climate productive potential; yield proper development
摘 要：
The field experiment of climate productive potential (CPP) and its exploitation of broomcorn millet and spring wheat on semiarid prone to draught area of south Ningxia was carried out for 1997 to 1999. The gradient fertilizer method was used to study maximum yield and yield proper development ratio (YPDR) of broomcorn millet and spring wheat on dryland under limited precipitation. The results of experiment show that average CPP, WUE and YPDR of broomcorn millet on dryland for 3 years (under 3 different rainfall type year) is 1 760.5 kg/hm 2, 0.647 kg/m 3 and 90% separately with suitable fertilizer application of 90kg/hm 2 nitrogen and 45kg/hm 2 phosphorus, and average water productive potential, WUE and of spring wheat for 3 years (irrigated before planting in 1998 and 1999) is 2 554.0 kg/hm 2, 0.903 kg/m 3 accordingly. The CPP, WUE and YPDR on dryland without irrigation in 1997 are 1 158.0 kg/hm 2, 0.690 kg/ m 3 and 85% respectively under 60 kg/hm 2 nitrogen and 30 kg/hm 2 phosphorus applied.
