The present study investigated if partial reduction of shoot dry matter during early vegetative growth phase of chickpea crop (cv. PBA Seamer) saves sub-soil water for reproductive growth and grain filling of the crop grown at 9 diverse environments. The environments were created by a combination of 3 sites (Emerald, Hermitage and Kingaroy), 3 planting windows (environments 1, 2, 3 at each site) with and without supplementary irrigation. The effects of environments on canopy management (partial reduction in shoot dry matter vs control) and irrigation treatments on the water uptake by roots, crop growth and yield performance and yield components were investigated. Crops in the planting windows (EN 1, 2, 3) experienced variable environments at each site. Days to 50% flowering and crop maturity reduced progressively from EN 1 to EN 3 at the three sites. The environment had significant effect on shoot biomass, yield and HI at the three sites (P < 0.01 or P < 0.0001). Environments had bigger effects on crop that partial reduction in shoot biomass (PRS). The PRS at early vegetative phase resulted in a 25% reduction in radiation intercepted but rapid compensatory growth that followed, resulted in minimal effect on shoot biomass and yield. The HI varied from 0.18 in EN 1 at Kingaroy to > 0.5 in EN 2 at Emerald. There was a trend for an increase in HI from EN 1 to EN 3 at all sites. The response to Irr, computed as the difference in peak shoot biomass and yield between the Irr and RF treatments, was the highest at Hermitage and the least at Emerald site. Vapour pressure deficit during reproductive phase accounted for the majority of variation in shoot biomass response to irrigation (r² = 0.66, P < 0.001) for total dry matter and (r² = 0.46, P < 0.01) for yield. The environments had a significant effect on radiation use efficiency and water use efficiency and the yield components including hundred seed weight.

本研究调查了鹰嘴豆作物（cv。PBA Seamer）在早期营养生长阶段中茎干物质的部分减少是否为在9种不同环境下生长的作物的生殖生长和谷物填充节省了亚土壤水。该环境是由3个地点（翡翠，冬宫和金格罗伊），3个种植窗（每个地点的环境1、2、3）（有无辅助灌溉）的组合而创建的。研究了环境对冠层管理（与对照相比部分减少了枝干物质）和灌溉处理对根系吸水量，作物生长以及产量表现和产量构成的影响。种植窗（EN 1、2、3）中的农作物在每个地点都经历了各种环境。在这三个地点，从EN 1到EN 3的天数达到50％的开花和农作物成熟期逐渐减少。该环境对三个地点的枝条生物量，产量和HI有显着影响（P <0.01或P <0.0001）。环境对作物的影响更大，部分减少了茎秆生物量（PRS）。处于营养早期的PRS导致截获的辐射减少25％，但随后出现快速的补偿性生长，因此对苗生物量和产量的影响最小。HI从Kingaroy的EN 1中的0.18变化到Emerald的EN 2中的> 0.5。所有站点的HI都有从EN 1升高到EN 3的趋势。对Irr的响应，以Irr和RF处理之间的最高枝生物量和产量的差异计算，在冬宫最高，而在翡翠站点最低。总干物质为² = 0.66，P <0.001 ），产率为（r ² = 0.46，P <0.01）。环境对辐射利用效率和水分利用效率以及包括百粒重的产量组成部分都有重大影响。